MILLER CAT Prius Generation 3 Cat Shield Installation Guide
- June 5, 2024
- MILLER CAT
Table of Contents
INSTALLATION GUIDE
Prius Generation 3 (2010–2015)
ALUMINUM | STAINLESS
Thank you for purchasing the best Prius catalytic converter theft
deterrence device on the market.
Please read the instructions below to ensure the most accurate and secure fit
for your Cat Shield. Professional installation is highly recommended and
knowledge of using rivet nuts plus a rivet nut tool is necessary.
PARTS INCLUDED WITH YOUR CAT SHIELD
TOOLS REQUIRED
- Protective eyewear
- Marking pen
- Drill
- 25/64” drill bit (no pilot bit)
- Rivet nut tool with M6 mandrel/head
- ¼” bit driver
- 10mm socket
- Center punch (optional)
- Pliers
INSTALLATION TIPS
- Torque specs on tamper-proof screws are 37-72 inch lbs.
STEP 1
Prep the shield for install. Prior to installing the shield, the tabs and
bridges must be bent.
Place the shield with the “M” logo on a table or flat edge surface, and use
your hands or pliers to bend the two tabs downward to create a 90-degree
angle. Bend the tab on the “M” side first (which is longer than the other
side) and then the tab on the other. Next, bend the three bridges of the
shield to a 45-degree angle with a set of pliers. This will create a 3D
feature that will stiffen the shield to increase rigidity. Refer to image A
for reference.
STEP 2
Remove heat shield and O2 sensor bracket. Remove the four-panel fasteners
using a fastener removal tool or flat head screwdriver. Next, using a 10mm
socket, remove the bolt holding the O2 sensor and move the bracket out of the
way. Refer to image B for locations of the O2 sensor bracket and the next
steps.
STEP 3
Enlarge the four-panel holes. Using a step drill bit or the 25/64” drill
bit, enlarge the four holes in image B.
*CAUTION: when drilling the furthest hole toward the driver side. The
fuel and brake lines are close to this hole and aggressive drilling could
result in damage to those lines.
STEP 4
Install the rivet nuts. Using a rivet nut tool, install the four rivet nuts to
the recently drilled holes. Please watch an instructional video if you have
never used a rivet nut tool before.
STEP 5
Mark two holes for drilling the last two rivet nuts.
Temporarily place the Cat Shield onto the vehicle by fastening four screws
into the four rivet nuts. When the shield is in place, use a marker to mark
the two rear holes of the shield (this is where two new holes must be
drilled). *Optional: Use a center punch tool at each of two markings for
easier drilling.
Next, remove the shield and using the 25/64” bit drill two holes where you
made the markings. Install the remaining two rivet nuts into these holes.
Refer to image C for the
location of the holes to be drilled.
STEP 6
Reinstall the O2 sensor bracket and add rubber
dampeners to the shield. Using a 10mm socket, reinstall the O2 sensor
bracket. Next, place the three rubber dampeners along the front end of the
shield. These dampeners will be placed between the shield and the vehicle to
help reduce noise and vibration. Make sure to put them on the correct side of
the shield. Install each set of screws in the order shown in image E. Use the
provided tamper-proof bit to tighten the tamper-proof screws. Refer to image
D. 
STEP 7
Install the Cat Shield. Put the shield back on the vehicle and fasten the
front four mounting points first. Loosely install the hardware in the
following order, tamper-proof screw, lock washer, and then fender washer.
STEP 8
Install the last two (2) rear screws and spaces. Place two aluminum spacers
between the shield and rivet nut. The spacers help minimize any rattling and
keep the shield on the same plane as the frame of the vehicle. Install the
hardware through the shield, spacers, and the rivet nut. Refer to image E for
the order of the hardware. Complete the instruction by tightening each
screw.
STEP 9
Apply Cat Shield sticker (optional). Place the sticker on the vehicle to
warn thieves that the vehicle is protected by Cat Shield! Recommended
placement: Rear liftgate window.
Congratulations! You are now #catshieldprotected.
If you have any questions or feedback about our product, contact us at
info@millercat.com. Don’t forget to tag us with your
latest install using @millercat.corp and
#catshieldprotected.
Documents / Resources
|
MILLER CAT Prius Generation 3 Cat
Shield
[pdf] Installation Guide
Prius Generation 3 Cat Shield, Prius Generation 3, Cat Shield, Generation 3
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