Balancing Act

DIY: How to install Prius PLUS Ground Effects kit by TRD

Prius PLUS Performance EvolutionI have finally gotten around to write up the do-it-yourself installation guide with complete instructions on how to install the 7-piece Prius PLUS Performance Ground Effects kit by TRD onto a 2012+ 3rd gen Toyota Prius. I wrote this guide because the kit did not come with any installation instructions and I could not find any decent DIY installation guide online that thoroughly explains the installation process. Since the only part that is different in the 2010-2011 kit from 2012+ kit is the shape/contour of the front air dam pieces, this guide should also apply to 2010-2011 owners. I hope this guide helps other weekend DIY'er who are interested in installing this kit by themselves. Be sure to read the entire guide before proceeding. If you do not have the proper tools or experience to perform the illustrated steps on your own, you should have a professional installer perform the installation on your behalf. This guide is written for informative purpose and serves as a guideline only with warranty neither expressed nor implied.

The Prius PLUS Performance Ground Effects kit is a component of both the Prius PLUS Appearance and Prius PLUS Performance packages, both of which are generally port installed options but components can be ordered separately and installed by yourself or by a dealership. The complete package ranges from $2,299 to $2,999 on the 3rd gen Prius Five, or $2,999 to $3,699 on the Prius Two, Three and Four. Fortunately the components of the PLUS package can be purchased a la carte, which actually saves you money.

  • Prius PLUS Performance Lowering Springs - $174.40 (PTR07-47100)
  • Prius PLUS Performance Ground Effects kit - $704.41 (PT938-47120-[#color#])
  • Prius PLUS Performance Rear Sway Bar - $212.55 (PTR11-47010)
  • Prius PLUS Performance Carpet Floor Mat - $110.00 (PT926-47121-10)
  • Prius PLUS Performance 17" Alloy Wheels - $,1400.00 (PTR20-47010)
  • Prius PLUS Performance Evolution Exterior Badge - $55.00 (PT413-47110)

If you own a Prius Two, Three or Four, the price of the PLUS Performance package purchased separately will cost $2,656.36. Assuming tires are $130 each (Yokohama Avid ENVigor), the total cost with tires is $3,176.36 - still a savings of $522.64 (not factoring taxes assessed with the dealer installed option).

While there are more parts to this kit, it's definitely a much easier install than the 5-piece Acura A-Spec underbody spoiler and high-wing kit I've installed on the Acura RSX in the past. The Prius PLUS Performance Ground Effects kit is available from Toyota pre-painted in four popular colors. Here are the part numbers for  the color-specific kit, broken down by model years:

2012+ 3rd gen Prius PLUS Performance Ground Effects Kit part numbers

  • PT938-47120-11, Winter Gray Pearl (color code 8V1)
  • PT938-47120-21, Blizzard White (color code 070)
  • PT938-47120-01, Classic Silver (color code 1F7)
  • PT938-47120-02, Black (color code 202)

2010-2011 3rd gen Prius PLUS Performance Ground Effects Kit part numbers

  • PT938-47100-11, Winter Gray Pearl (color code 8V1)
  • PT938-47100-21, Blizzard White (color code 070)
  • PT938-47100-01, Classic Silver (color code 1F7)
  • PT938-47100-02, Black (color code 202)

I also like to point out that the 2012+ 3rd gen kit is 100% compatible with any 2012+ 3rd gen Plug-in Prius trims as well. The only caveat is you will not be able to find it in PiP exclusive colors. I don't believe Toyota sell the kit unpainted, so if you want to add this kit to your Plug-in Prius or regular Prius whose exterior color that didn't make it into the "popular color" list, you'll need to purchase one of the available pre-painted kits and have a body shop color match it to the color of your Prius for you. The plus side is if you drive a Clear Water Blue Metallic, Sea Glass Pearl or Barcelona Red Prius with a Prius PLUS Performance Ground Effects kit installed, you'll have one very unique looking Prius.

Toyota Part WorldSo after spending hours, days and weeks searching for the best price; from eBay to local and online dealerships - I've located an online parts dealer specializing in OEM Toyota parts, Toyota Part World (http://www.toyotapartworld.com), which I believe is affiliated with the parts department of Heartland Toyota Scion in Bremerton, Washington. As far as I am aware, Toyota Part World has the kit available for the absolute lowest pricing, and they even have a Best Price Guaranteed program. Meaning if you are to find the same item at a lower price within 30-days, they will refund you the difference. As of this writing, the price for the 2012+ 3rd gen 7-piece Prius PLUS Performance Ground Effects kit from Toyota Part World is $707.41 plus shipping and no tax outside of the state of Washington. The price for the Prius PLUS Performance Ground Effects kit designed for the 2010-2011 Prius models is slightly higher, at $827.31, also available at Toyota Part World. Shipping from WA to CA was only $67.82, totaling $775.23 for the 2012+ 3rd gen kit. This price is much lower than the price offered by Clear Water Toyota on eBay, which amounts to $865.00 including free shipping (best price on eBay).

Toyota Part World did not have the kit in stock and had to be pre-ordered. They've clarified this on their product page. Once you place an order for the Prius PLUS Performance Ground Effects kit from Toyota Part World, it takes up to 3 business days for them to receive it from the closest Toyota Motor Sales parts hub (in this case, Portland, OR) and then ship it out to you. Depending on where you live, this can take anywhere from a total of 4 to 10 business days before you receive your parts. I placed my order on a Sunday evening and received my kit on Friday in the same week after placing my order, i.e. 4 business days. Service from Toyota Part World is expedient, shipping is reasonable and service is excellent. I received email updates from Toyota Part World as soon as my order status changed (i.e. from Pending, to Processing, to Shipped). Prior to placing my first order on their site, I submitted an inquiry asking them how long it would take to process products marked as pre-order/special order. Within minutes, I received a response.

Unboxing

The Prius PLUS Performance Ground Effects kit arrived in one large rectangular Toyota marked box weighing in at approximately 30 lbs.  Tools are not included so you will need to source out the tools to proceed with the installation. I was surprised at the level of detail Toyota put into making this kit. For an add-on underbody ground effects kit (aka lip kit), you'd figure the pieces are installed via a few self-tapping screws and/or support brackets with double sided tape (as with the OEM Acura A-Spec underbody spoiler kit for the Acura RSX). The installation require that you first install the installation brackets onto the front and rear bumpers by adhering and then riveting them into place. After that's done, the actual components of the Prius PLUS Performance Ground Effects kit can then be snapped onto the installation brackets for a secure installation.

Prius PLUS Performance Ground Effects kit shipping box

Prius PLUS Performance Ground Effects kit shipping box

Part number

Part number

Unboxing the Prius PLUS Performance Ground Effects kit package

Unboxing the Prius PLUS Performance Ground Effects kit package

One box per component (front, sides, rear)

One box per component (front, sides, rear)

Parts Included

Use this check list to ensure that all of the parts are accounted for and intact:

Prius PLUS Performance front air dam

Prius PLUS Performance front air dam

Front Air Dam (T0319-000-11)

  • Rivets, u-nuts, 10 mm bolts (AB0290-006)
  • RH accent (T0305-200-CC)
  • LH accent (T0305-100-CC)
  • Installation bracket set (BP090-004)
    • RH, outer (T0309-200_1)
    • RH, inner (T0310-200_1)
    • LH, outer (T0309-100_1)
    • LH, inner (T0310-100_1)

Prius PLUS Performance side rockers

Prius PLUS Performance side rockers

Side Rockers

  • RH cladding (T0249-200)
  • LH cladding (T0249-100)
  • Mud flap, LH (T0279-100)
  • Mud flap, RH (T0279-200)
  • Clips set (AB0446-000)

Prius PLUS Performance rear air dam

Prius PLUS Performance rear air dam

Rear Air Dam (T0296-000-XX)

  • Rivets, screws, u-nuts and caps set (AB0290-002)
  • Close-off panel, LH (T0274-100_1)
  • Close-off panel, RH (T0274-200_1)
  • Rear accent, LH (T0250-100)
  • Rear accent, RH (T0250-200)
  • Rear accent, Cavity (T0251-000)
  • Installation bracket set (BP0290-001)
    • Center installation bracket (T0252-000_1)
    • Side installation brackets (BP0290-001)
      • RH, outer (T02750-200_1)
      • RH, inner (T0253-200_1)
      • LH, outer (T0275-100_1)
      • LH, inner (T0253-100_1)

Tools Needed

  • Drill gun (preferably cordless)
  • 4.5 mm or 5/32 size drill bit
  • Masking tape
  • Microfiber cloth
  • Rivet tool (available online or at your local hardware store for as low as $5-$20)
  • Short Phillips screwdriver
  • Short flathead screwdriver
  • Socket and Ratchet set with 10 mm socket

Pre-installation Notes

Begin this project by giving your Prius a good ole car wash. Since the Prius PLUS Performance Ground Effect kits require that you mount support brackets with double-sided tape directly onto the front and rear bumpers, it is imperative to execute the installation on a clean Prius free of dust and grime. The side rockers are fine without a wash. Once the car is cleaned, you can proceed to install the kit in any order you wish. I recommend starting with the front, sides and then rear.

I've separated the installation directions into three different parts, respective of the area of the Prius, so you can install the parts you want in any order that you are comfortable with and split the install into multiple days instead of doing everything in one day. I recommend starting with the front since it is pretty easy and will prep you with experience for a quick and seamless install when it comes time to installing the rear pieces (which is similar to to front but with added parts and hardware).

Between taking notes for this installation guide and photographing, it took me a total of four hours to install all three components. The side rockers installation took about 20 minutes per side, the front air dam installation took about 15 minutes per side and the rear air dam took about 1 hour. All in all, minus the photographing and notes, it would've taken me about 2.5 hours to complete the entire install.

Installing the Front Air Dam

Step 1

Start by wiping down the lower side of the front bumper where the RH front air dam attaches with a microfiber cloth to pick up any residual dusts unseen by the naked eyes.

Wipe lower side of front bumper with microfiber cloth

Wipe lower side of front bumper with microfiber cloth

Then wipe down the same area with the included alcoholic wipe (I recommend doing both sides as the included alcoholic wipe is small). The alcohol will evaporate quickly, so perform a quick and thorough job when using the wipe.

Wipe the same area with included alcoholic wipe after wiping with microfiber cloth

Wipe the same area with included alcoholic wipe after wiping with microfiber cloth

This step is important as it will get rid of unseen blemishes, such as oil, dust and/or body wax. For the sake of simplicity, we'll start with the right hand side (RH). Once cleaned, remove the a plastic push pin and a plastic 10 mm Phillips screw-bolt from underneath the right hand side of the front bumper:

Remove push-pin clip and 10 mm bolt from underneath side of front bumper

Remove push-pin clip and 10 mm bolt from underneath side of front bumper

Black push-pin clip and silver plastic 10 mm bolt

Black push-pin clip and silver plastic 10 mm bolt

Step 2

Using the locating tabs on the installation brackets, align the outer right hand (RH) installation bracket onto the lower right area of the front bumper.

Outer front installation bracket being aligned

Outer front installation bracket being aligned

Step 3

Hold the outer installation bracket firmly against the bumper, ensuring correct alignment, as you peel off the the adhesive backing from the installation bracket. It's probably better to have the red tape tabs folded UP instead of DOWN (as pictured) as the locating tabs may get in the way.

Outer installation bracket adhered to front bumper

Outer installation bracket adhered to front bumper

Step 4

Using the locating tabs on the inner right hand (LH) installation bracket, align the inner installation bracket with the front bumper and the outer installation bracket already adhered onto the front bumper from step 3 as illustrated.

Inner installation bracket aligned to front bumper and outer installation bracket

Inner installation bracket aligned to front bumper and outer installation bracket

Step 5

Using a 4.5 mm or 5/32" size drill bit, carefully drill into the holes on the installation bracket and through your front bumper. You will be drilling seven holes total per side, including one on the side in the fender well using the bracket locating tab as a drill guide.

Drill through holes on installation brackets with a 5/32 or 4.5 mm drill bit

Drill through holes on installation brackets with a 5/32 or 4.5 mm drill bit

Step 6

Retrieve 6 rivets from the hardware bag and insert them into the 6 holes on the installation brackets you've just drilled. Be sure to insert the wide end first, leaving the long stem exposed as follow:

Insert wide end of rivets into the 6 holes you've just drilled on the installation brackets

Insert wide end of rivets into the 6 holes you've just drilled on the installation brackets

Step 7

Insert the long end of a rivet into your rivet tool and then press the handles of the rivet tool together. Be careful as you may inadvertently pinch your fingers while pressing down on the handles. This may require you to press repeatedly until you hear a pop sound and the stem (long end) breaking off. This should leave the installation bracket securely fixed onto your front bumper.

Use a pop rivet gun to install the rivets

Use a pop rivet gun to install the rivets

Rivet stems after a successful rivet job

Rivet stems after a successful rivet job

All six rivets have ben fastened

All six rivets have ben fastened

Step 8

Once the installation brackets are riveted to the front bumper, break off the locating tabs on the installation brackets and discard them.

Break off location tabs on installation brackets

Break off locating tabs on installation brackets

Discard location tabs with rivet stems

Discard locating tabs with rivet stems

Apply a strip of masking tape approximately 10 mm above the installation brackets to protect the front bumper's paint when installing the front air dam part.

Apply masking tape 10 mm above installation brackets

Apply masking tape 10 mm above installation brackets

Each of the front air dams will be snapped onto the installation brackets in two steps; first the outer bracket and then the inner bracket. Align the air dam with the front bumper and side fender well. Then using gentle force, push the air dam part upward, then press the it inward against the front bumper with force and ensuring the tabs have cleared the bracket hooks. Finally, push the front air dam part downward against the front bumper to snap in position. This is harder than it looks and if you missed one or two hooks, you'll need to start over. To disengage the hooks from the tabs, simply lift the air dam up and pull away from the bumper.

Installing the front air dam

Installing the front air dam

I have taken photos of what the installation process looks like without the front bumper.

Left Hand (LH) front air dam and corresponding installation brackets

Left Hand (LH) front air dam and corresponding installation brackets

Left Hand (LH) front air dam and corresponding installation brackets

Left Hand (LH) front air dam and corresponding installation brackets

Once the outer surface of the RH front air dam is snapped into position, continue with the inner surface of the front of the air dam. While holding the outer surface of the RH front air dam so it doesn't disengage, press upward and inward (again, to clear the hooks on the installation bracket) and the press downward to snap the front of the air dam into position.

Once this is complete, double check to make sure the RH front air dam is secured into place firmly and that there are no gaps between the rubber weather seal and the front bumper.

There should be no gap between the rubber seal and the front bumper

There should be no gap between the rubber seal and the front bumper (rear air dam shown)

Step 9

Install the u-nut from the hardware bag onto the hole on the fender well you've drilled in step 5:

U-nut inserted into the hole on the fender well

U-nut inserted into the hole on the fender well

Install the 10 mm bolt into the u-nut and tighten:

Secure 10 mm bolt into U-nut

Secure 10 mm bolt into U-nut

Re-install the plastic push pin clip and 10 mm bolt removed from underneath the bumper from step 1. Repeat steps 1 through 9 for the left hand side:

Repeat steps 1 through 9 for the opposite side

Repeat steps 1 through 9 for the opposite side

Installing the Side Rockers

The Prius PLUS Performance side rockers are without a doubt the easiest parts to install of the 7-piece package. It should take you no more than 20 minutes per side.

Step 1

Apply masking tape at the following areas of your front and rear doors to protect from inadvertent scratches when removing the OEM side rocker and installing the PLUS side rocker.

Apply masking tape on bottom of door to prevent scratches

Apply masking tape on bottom of door to prevent scratches

Step 2

Remove 4 plastic plugs from underneath the side rocker. These are disposable as the new hardware bags include  brand new plugs. If they are hard to budge, it's okay to break/chip them out of the body.

Plastic plugs x4

Plastic plugs x4

Then remove 4 large push pins. Save these large push pins for later re-installation.

Large push pins x4

Large push pins x4

These are the approximate location of where the plastic plugs and large push pins are located:

Locations of plastic plugs and large push pins

Locations of plastic plugs and large push pins

Remember to retain the large push pins for later re-installation.

Step 3

Use a 10 mm socket to remove two 10 mm bolts from the front and underneath the front of the side rocker.

10 mm bolt at front of side rocker

10 mm bolt at front of side rocker

10 mm underneath front of side rocker

10 mm underneath front of side rocker

Step 4

Use a 10 mm socket to remove two 10 mm bolts from the back and underneath the back of the side rocker.

10 mm at the back of the side rocker

10 mm at the back of the side rocker

10 mm bolt beneath back of side rocker

10 mm bolt beneath back of side rocker

Remove the fastener from the OEM mud flap at the indicated location and discard the mud flap and fastener once they are free:

Remove fastener with a trim removal tool or simply a flathead screwdriver

Remove fastener with a trim removal tool or simply a flathead screwdriver

Discard OEM mud flap

Discard OEM mud flap

If the OEM mud flap is troublesome to remove, you can just cut it out with a garden pruner and pry out the fastener. The hardware bag includes a new replacement fastener.

Step 5

Use a Phillips screwdriver to remove 2 Phillips screws from the side rocker located near the front and rear doors:

Remove Phillips screw from side rocker near front door

Remove Phillips screw from side rocker near front door

 

Remove Phillips screw from side rocker near rear door

Remove Phillips screw from side rocker near rear door

Step 6

Gently pull the OEM side rocker away from the vehicle. The side rocker is secured with push clips, so just start from the back and pull the rocker out until you reach the front. There is a total of 9 clips you need to disengage:

Starting from the back, gently pull the side rocker away from the vehicle

Starting from the back, gently pull the side rocker away from the vehicle

The side rocker is secured to the body by 9 push clips

The side rocker is secured to the body by 9 push clips

OEM side rocker removed

OEM side rocker removed

Step 7

Retrieve 9 new push clips from the hardware bag and install them into the PLUS side rocker in their corresponding holes:

Install new clips onto the PLUS side rocker

Install new clips onto the PLUS side rocker

Make sure the clips are snapped into place and float inside their holes without falling out. Once all 9 clips are securely on the PLUS side rocker, it's time to re-install.

Step 8

Position the PLUS side rocker so that each of the 9 clips installed in step 7 are aligned with their corresponding holes on the vehicle. Starting from the center, push the clips into their holes with gentle force and work yourself outward. If done correctly, you should hear a snapping sound confirming successful engagement with the vehicle.

Install the PLUS side rocker

Install the PLUS side rocker

Step 9

Re-install the 2 Phillips screws that were removed from step 5.

Re-install two Phillips screws

Re-install two Phillips screws

Step 10

Re-install the 10 mm bolts that were removed earlier from the front of the OEM side rocker in step 3.

Replace the two 10 mm bolts that were removed from the front of the OEM side rocker earlier

Replace the two 10 mm bolts that were removed from the front of the OEM side rocker earlier

Step 11

Locate new mud flap from the PLUS side rocker package and then install using 10 mm bolts that were removed earlier from the back of the OEM side rocker in step 4. Slide the PLUS side rocker through the slit on the new mud flap and then install new fastener clip through mud flap and into the vehicle mount:

New mud flat installed

New mud flat installed

Step 12

Retrieve new plastic plugs from hardware bag and reinstall them into the installation positions as noted in step 2. Locate the large push pin fasteners that were removed earlier and re-install them into the positions noted in step 2.

Prius PLUS Performance side rocker installed

Prius PLUS Performance side rocker installed

Repeat steps 1 through 12 for the opposite side.

Installing the Rear Air Dam

The rear air dam is definitely the hardest part to install, relatively speaking. The installation is straight forward and easy once you've already installed the front air dams. What makes it hard is the number of parts for the rear air dam, including removal of the rear under body spoiler panels and installing the PLUS close-out panels require additional time and care to ensure a thorough job.

Step 1

Start by removing the OEM black plastic underbody spoiler panels beneath the rear of the car. You may need to jack up your car if your car is excessively lowered and/or if you cannot reach the parts by hand. My Prius is lowered on Prius PLUS Performance springs and I had no problem reaching and installing the parts. Start by removing the left hand side (LHS). There are three 10 mm bolts and two plastic retainer clips to remove:

Location of clips and bolts on LH rear underbody spoiler panel

Location of clips and bolts on LH rear underbody spoiler panel

After removing the hardware, pull the LH underbody spoiler panel off at the corner of the rear bumper:

Pull the LH underbody spoiler panel to remove it

Pull the LH underbody spoiler panel to remove it (RH side shown)

Once the LH underbody spoiler panel is removed, you may discard it and the bolts. Keep the plastic retainer clips for re-installation.

LH factory underbody spoiler panel and hardware

LH factory underbody spoiler panel and hardware

Step 2

Next, remove the center underbody spoiler panel. This piece is disengaged by removing 9 plastic retainer clips at the following locations:

Locations of 9 plastic retainer clips on center underbody spoiler panel

Locations of 9 plastic retainer clips on center underbody spoiler panel

Pull the center underbody spoiler panel from its mounting points:

Remove the center underbody spoiler panel

Remove the center underbody spoiler panel

Once the center underbody spoiler panel is removed, you may discard it but keep the platic retainer clips:

Center underbody spoiler panel and hardware

Center underbody spoiler panel and hardware

Step 3

Remove the RH side underbody spoiler panel. The removal process is similar to the LH side panel as described in step 1 with one difference. There is one plastic wing nut holding the panel to the body that is removed by twisting. Follow the removal process as illustrated in step 1 to remove the RH underbody spoiler panel.

Location of wing nut on RH underbody spoiler panel

Location of wing nut on RH underbody spoiler panel

Wing nut from RH underbody spoiler panel, keep for re-installation

Wing nut from RH underbody spoiler panel, keep for re-installation

RH underbody spoiler panel and hardware

RH underbody spoiler panel and hardware

Discard the RH underbody spoiler panel and bolts, but keep the plastic wing nut for later re-installation.

Step 4

Wipe the entire lower rear bumper with a microfiber cloth, followed by the included alcoholic wipe. Proceed quickly as the alcoholic wipe evaporates rapidly:

Wipe lower rear bumper with included alcoholic wipe

Wipe lower rear bumper with included alcoholic wipe

Step 5

Retrieve the outer LH installation bracket and align it with the lower left side of the rear bumper using the locating tabs as guide. The locating tabs will conform to the curves of the rear bumper:

Align outer LH installation bracket onto lower left side of rear bumper

Align outer LH installation bracket onto lower left side of rear bumper

Make sure the red adhesive backing tabs are facing upward as illustrated above. Peel the tape while holding the installation bracket in place. Do not hold the bracket too tightly otherwise the adhesive backing tabs may break off (if this occur, you'll need to remove the bracket and remove the adhesive backing from the broken tab.

Outer LH installation bracket adhered to rear bumper

Outer LH installation bracket adhered to rear bumper

Once the adhesive tabs are removed, press the installation bracket against the rear bumper to ensure adhesion.

Step 6

Locate the inner LH installation bracket and again, use the location tab as guidance.

Align inner LH installation bracket onto lower left side of rear bumper

Align inner LH installation bracket onto lower left side of rear bumper

Make sure the corner tab of the inner installation bracket is mated to the slot on the outer installation bracket, then remove the red tape tabs to adhere the inner LH installation bracket onto the rear bumper:

Outer and inner LH installation bracket adhered onto rear bumper

Outer and inner LH installation bracket adhered onto rear bumper

Repeat for the right hand side.

LH and RH installation brackets intalled

LH and RH installation brackets installed

Step 7

Retrieve center installation bracket and position it between the LH and RH installation brackets. Ensure that there is a ± 2 mm gap between both:

Align the center installation bracket between the LH and RH installation brackets, ensuring a +/- 2 mm gap between both

Align the center installation bracket between the LH and RH installation brackets, ensuring a +/- 2 mm gap between both

Remove the red tape tabs and adhere the center installation bracket onto the rear bumper:

All rear installation brackets adhered to rear bumper

All rear installation brackets adhered to rear bumper

Step 8

Once all the rear installation brackets are adhered to the rear bumper, take a 4.5 mm or 5/32" drill bit and drill through the rear bumper using the holes on the installation brackets as a drill guide. Be sure to hold the bracket firmly in place while drilling and drill perpendicular to the surface. You may want to start drilling at the center hole of each bracket to enhance alignment. Once all of the holes are drilled, retrieve the rivets from the hardware bag and insert them into the holes you've just drilled.

Insert rivets into drilled holes on installation brackets

Insert rivets into drilled holes on installation brackets

Using your rivet tool, rivet the installation brackets to the rear bumper.

Rivet the installation brackets to the rear bumper

Rivet the installation brackets to the rear bumper

Step 9

Using the location tab on the fender well on the outer installation bracket as a drill guide, drill a hole using a 4.5 mm or 5/32" drill bit in both fenders. Drill through both the rear bumper fender and the fender well liner.

Step 10

Break off all the locating tabs from the installation brackets and discard:

Break off the locating tabs on the installation brackets

Break off the locating tabs on the installation brackets

Discard tabs along with rivet stems

Discard tabs along with rivet stems

Installation brackets riveted to rear bumper

Installation brackets riveted to rear bumper

Step 11

Apply a strip of masking tape 50 mm above the installation brackets, across the entire rear bumper, before installing the rear air dam components:

Masking tape 50 mm above rear installation brackets

Masking tape 50 mm above rear installation brackets

Step 12

Retrieve the LH rear air dam component and install it onto the LH side installation brackets by pushing up, then against the rear bumper ensuring clearance on all the tabs and then finally push the part down so that the tabs engage the hooks on the brackets. Double check for looseness and gaps.

Installing the rear air dam

Installing the rear air dam

Repeat for the RH side.

Repeat installation procedure to install RH side

Repeat installation procedure to install RH side

Step 13

Once both the LH and RH rear side air dams are installed, retrieve the center rear air dam. Using the installation process illustrated in step 12, install the center rear air dam onto the center installation bracket. Make sure the tabs are engaged to the hooks on the installation bracket. Check for side alignments and ensure a ± 2 mm gap between LH and RH side rear air dam parts.

Center rear air dam installed

Center rear air dam installed

Step 14

Retrieve the LH and RH rear close-out panels. Here is a comparison photo of the OEM side LH underbody spoiler panel vs. PLUS LH close-out panel:

OEM side LH underbody spoiler panel vs. PLUS LH close-out panel

OEM side LH underbody spoiler panel vs. PLUS LH close-out panel

Insert the LH close-out panel behind the rear LH side air dam and the center side air dam. Align the "boss" and the screw holes on the close-out piece to the holes on the LH side rear air dam. Also ensure that the rivet holes are aligned as well. When inserted correctly, the close-out panel sits flush with the air dam parts. See photo below for illustration:

Installing the LH rear close-out panel

Installing the LH rear close-out panel

Two of the rivet holes are on the LH and RH rear air dams, but the third one sits on the rear center air dam part at an angle. You may need to pull the center air dam to make sure it is aligned properly although if the close-out panel is flushed with the rest of the body, it should be aligned. Retrieve 3 rivets from the hardware bag and rivet the LH side rear air dam to the LH side close-out panel:

Two visible rivets

Two visible rivets on LH and RH rear air dam pieces

Ideally, you want to rivet the side rear air dams onto the close-out panels before installing the rear center air dam for clearance (realized this after reviewing the DIY).

Step 15

Once you've installed the three rivets (per side), install the 6.3 x 40 mm screw onto the open screw hole. This screw need to engage the pink plastic screw grommet on underside of the rear bumper.

Install the 6.3 x 40 mm screw into the screw hole

Install the 6.3 x 40 mm screw into the screw hole

Step 16

Install two plastic retainer clips that were removed from the factory LH side underbody spoiler panel in step 1 onto the following locations:

Reinstall two plastic retainer clips

Reinstall two plastic retainer clips

Step 17

Install a U-nut into the hole you've drilled in step 9. Make sure the U-nut is installed between the rear bumper fender well and LH side rear air dam:

U-nut installed onto hole drilled on fender well

U-nut installed onto hole drilled on fender well

Retrieve two 6.3 x 20 mm self-tapping screws and install them into the fender well through the LH side rear air dam and u-nut:

Install two 6.3 x 20 mm self-tapping screws into the fender well through the side air dam

Install two 6.3 x 20 mm self-tapping screws into the fender well through the side air dam

Repeat steps 14 through 17 for the RH side rear close-out panel except for one difference; there are no plastic retainer clips. Installation is done by reinstalling the plastic wing nut that was removed earlier in step 3:

Re-install wing nut extracted from step 3

Re-install wing nut extracted from step 3

Step 18

Once both close-out panels are installed, retrieve the plastic retainer clips removed from the factory underbody spoiler panels and re-install them into the following locations:

Re-install plastic retainer clips into these locations

Re-install plastic retainer clips into these locations

Step 19

Retrieve two plastic close-out clips from the hardware bag and install them onto the outer edges of the center rear air dam:

Close-out clip installed onto left hand side of center rear air dam

Close-out clip installed onto left hand side of center rear air dam

Close-out clip installed onto right hand side of center rear air dam

Close-out clip installed onto right hand side of center rear air dam

To ensure proper engagement, you may need to pinch the close-out panel and the center rear air dam part together before inserting the close-out clip. Tighten all hardware and do a final inspection on the installed kit to ensure that they all sit flush and securely. There should be no gaps between any of the rubber strips and the installed parts should not feel loose. Check that the brackets are engaged by lightly tapping and listening for looseness. Congrats, you've just installed your Prius PLUS Performance Ground Effects kit by yourself using this guide!

Before and after comparison

Front - Before

Front - Before

Front - PLUS'ed

Front - PLUS'ed

Side - Before

Side - Before

Side - PLUS'ed

Side - PLUS'ed

Rear - Before

Rear - Before

Rear - PLUS'ed

Rear - PLUS'ed

Where to Buy

Toyota Part World - http://www.toyotapartworld.com

33 thoughts on “DIY: How to install Prius PLUS Ground Effects kit by TRD

  1. Curt

    Would you consider posting a couple close up pics of the wheel areas where mud flaps would be? I currently have mud flaps and I question whether they are compatible with the body panels. I live near Bremerton, wa and my prius is going to heartland for the Plus springs this week. Thanks!

    1. 5teve-0 Post author

      The mud flaps will not fit with the PLUS body kit on. The rear lower spoiler from the PLUS kit extends the body down by about an inch, I believe. So if your mud flaps are molded to attach onto the the rear bumper, it will be too short and will not contour with the lip kit. I'll take some pics later, kinda wet (raining) right now.

      1. Curt

        Ahhh yes, just as I suspected. It changes the overall shape and size of the places where the mud flaps would go. Now I need to consider whether or not I truly need mud flaps. (They're really nice in the winter near seattle). Also, do I see some PLUS wheels in the reflection of this first picture?

        Thanks for posting, and for all the guidance you give. I'm considering trying the rear view mirror project--- I would never consider it without your thorough directions. Thanks.

  2. Dick

    Checked with toyotaworld for the ground effects kit and the current price is $765.82 plus shipping for the PT 938-47120-02. for information only.... Thanks

  3. Dick

    Thanks for a remarkably complete guide. Just purchased a 13 Prius Personna and had the springs and anti sway bar installed. It took the tech's form 9 to3 to finish.
    I am considering installing the body components myself. I have done many auto projects including a frame up on a '50 MG-TD.
    Are you pleased with the changes to the stock body? and what led you to add these components. thanks

    1. 5teve-0 Post author

      Congrats on the Persona and thanks for the kind comment; to date, I've only seen one driving around in my neck of the wood (Torrance) and it's in the new black cherry color. I'm very pleased with the PLUS ground effects kit. It gives it the nice subtle sporty look that doesn't take away the nice lines of the Prius. I can understand the springs taking a while to install (took my Toyota dealership about 2 hours to install mine), but I installed the sway bar in less than an hour without lifting the car up. I definitely recommend install the kit yourself, it's easy and will save you some cash. If you have any questions about the install that this guide hasn't address, just post away.

  4. Rick

    Hey! Got it all installed, but ended up taking me 3 hours and 45 minutes.. I think I would have taken less time if I knew that the plugs (4 on each side) of the side rockers were disposable since they include brand new ones with the kit.. I was being careful about removing them because I did break off a piece of the first one I tried removing.. Because of this, the side rockers were the ones that took the most time for me.. Out of all the pieces/parts, I'm going to say that I found the rear to be the easiest for me, but that's probably because by then, I had experience from doing the front and sides.. Overall, it was a good experience and saved some money by doing it myself.. 😀

    1. 5teve-0 Post author

      Hey Rick, glad to hear the install went well. It's definitely a great feeling to know that you installed your own parts and saved upward to $400 in labor. LOL, I should've clarified that the plugs and clips on the rockers are disposable (doing it now). Next DIY will be the PLUS rear sway bar. I managed to install it without jacking up the car!

      1. Rick

        Actually, just the plugs (4 on each side) are disposable, the push pins (also 4 on each side) get re-used with the new side rockers.. 😉

        Yeah, about saving money on labor, that's exactly what I thought.. Now I have money for more stuff, right? lol.. Which by the way, just ordered the OGS electronic shifter.. I went with the OGS one instead of the Stage 10 because I want to be able to change the color and brightness of the buttons.. 🙂

        About the sway bar.. Do you notice the difference? Is it worth it?

        Can't wait to see the write up on that! 😀

        1. 5teve-0 Post author

          Right! I saved the plugs and old clips (the 9 push clips on the OEM rockers) in case I have use for them in the future. The sway bar, hands down, makes a huge difference. You probably won't feel a difference if you drive the Prius like 95% of other Prius drivers on the road, but if you corner fast or take on curvy roads, it's a big winner in my book. Don't get me wrong, it's no BMW, Porche or Audi, but it's definitely no stock Prius either haha. Install took about 40 minutes, but 1 hr while taking photos. Get it from Toyota Part World for the best price. BTW, where did you get the OGS shifter from? I believe they started LHD versions too. I think Kyoei USA has it but need to phone order it. I've been looking for a reputable reseller.

          1. Rick

            I got the OGS shifter from LSD Motorsports via their ebay store (http://goo.gl/9bVl4), but I may have purchased their last one.. They're in Southern California, so maybe a drive away for you.. 😉 I emailed them before buying, to make sure it was the LHD version, and they said yeah.. We'll see, I'm suppose to get it on Monday.. 🙂

            About the sway bar.. The price always seemed a little steep for me, but haven't checked Toyota Part World to see what they are asking for it.. I'll wait for your write-up and see how easy/hard it is to install and maybe base it off of that.. 😛

          2. 5teve-0 Post author

            Thanks for the info, I've ordered from LSD before. Hopefully they meant designed for LHD and not just LHD-compatible :O. The sway bar from TPW is $212 + shipping, which came out to about $250 from WA to CA. I'll probably have a write up within a week or two, it's going to be a busy next two weeks.

          3. Rick

            Well, on my email to them, I specifically asked if the "D" button was on the left side instead of the right.. They said yes, but we'll see.. :-/

            Sounds good, I'll be looking forward for the write up..

          4. 5teve-0 Post author

            Cool, let me know how it turns out. I just got a quote from Kyoei-USA for the OGS switch; $243 + shipping and in-stock. Might jump the gun this weekend.

          5. Rick

            Did they say how much was shipping? Also, LHD version, right? Mine was $248 + tax, free shipping.. So, about $267 total..

            For some reason, I thought you already had the Stage 10 one.. Maybe from one of your other posts..

          6. 5teve-0 Post author

            Just heard back from Kyoei; shipping is $10 but available for pick-up in SoCal, so tax is assessed - $264. It's the LHD version and I found it from the following link and emailed them some questions: http://kyoei-usa.com/blog/2011/06/ogs-prius-ip-switch/, the video depicts an LHD unit with "D" on the left; I was literally seconds from ordering the Stage 10 unit a while back, but held off immediately after learning about the possible existence of an LHD OGS shifter.

          7. Rick

            Nice! Yeah, I actually ordered the Stage 10 (silver with green) initially, but continued my research and found the OGS one with the LHD configuration.. So, I immediately asked for the Stage 10 order to be canceled, because I wanted more control of the light/s, what color, what brightness, etc.. It has been one of those things/mods that I've been wanting for a while, but I always thought that the "D" on the right side (RHD version) just wasn't right.. Let's hope it's all quality and works properly..

            Next on my list, the shark fin antenna.. Any recommendations? lol..

          8. 5teve-0 Post author

            Yep, exactly the reason why I opted for the OGS - the ability to customize the LED. If all works out, I may have an OGS unit in my hands tomorrow. Still awaiting to hear back from Kyoei re: pick-up arrangements in my neck of the woods! I have the VG shark fin installed, so naturally, I'll recommend that http://www.visualgarage.com/Order.php

          9. Rick

            Damn you! (For being able to have it so soon/fast)..

            So, on that shark fin.. Did you notice any issues with reception and whatnot? Also, how slow/fast was shipping? Looks like they have to paint them instead of having some ready to go..

          10. 5teve-0 Post author

            LOL, the VG shark fin was one of the first mod I did to the Prius (after tinting). I remember it took about 1 whole week to receive it after placing the order, pretty quick. Ships from WA too, if I recall. Absolutely no issues with reception, in fact better HD radio reception compared to the OEM antenna stick.

          11. Rick

            Good to know.. Alright, I think I'm getting it.. Not available for 2012; 2010 is the latest they have as far as Prius goes.. Should be okay, right? Yours is also a '12, correct?

          12. Rick

            Good, because I already ordered it.. lol.. So, ships from Canada and it says 2-3 weeks, but may be sooner..

          13. 5teve-0 Post author

            Cool! VG originally said it would take 2-3 weeks for me as well. Turns out Kyoei doesn't accept local pick-up on Saturdays. Guess the OGS IP switch will be on the back burner for a few weeks!

      1. Rick

        Yeah, we'll see.. I placed the order earlier today from the link you provided.. I'm thinking I'll end up doing it next Saturday (9th), assuming I have it by then.. 🙂

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.