How To Install: 2022–2025 Subaru WRX 4th Brake Light Kit

How To Install: 2022–2025 Subaru WRX 4th Brake Light Kit
January 15, 2026 | Print this Page
How To Install: 2022–2025 Subaru WRX 4th Brake Light Kit

The 2022-2025 Subaru WRX 4th Brake Light Kit adds a high-intensity center-mounted brake light to improve rear visibility and safety. This installation guide will provide you with detailed instructions on how to install the 2022-2025 Subaru WRX 4th Brake Light Kit. Continue reading for step-by-step instructions below!

Table of Contents

Installation Tools

  • 10mm socket
  • 8mm socket
  • Phillips screwdriver
  • T25 Torx screwdriver
  • Plastic trim removal tool

Installation Instructions

Step 1 — Remove taillight trim fastener

Remove the plastic push clip securing the taillight trim using a Phillips screwdriver.

Step 2 — Remove taillight trim panel

Use a plastic trim tool to carefully remove the taillight trim panel.

Step 3 — Remove factory taillight bolts

Remove the two 10mm bolts securing the taillight assembly.

Step 4 — Remove taillight assembly

Carefully pull the taillight away from the vehicle.

Step 5 — Disconnect taillight connector

Disconnect the factory taillight connector and set the taillight aside in a safe location.

Step 6 — Connect inline harness

Connect the supplied inline harness to the vehicle-side taillight connector.

Step 7 — Route harness through body opening

Feed the harness connector down through the factory opening behind the bumper.

Step 8 — Reconnect taillight

Reconnect the taillight to the inline harness.

Step 9 — Reinstall taillight

Reinstall the taillight assembly and secure it with the two factory 10mm bolts.

Step 10 — Reinstall taillight trim

Reinstall the taillight trim panel removed earlier.

Step 11 — Remove center bumper cover

Using a trim tool, remove the rectangular cover from the center of the rear bumper.

Step 12 — Remove lower bumper clips

Remove the two plastic push clips from the underside of the bumper on each side.

Step 13 — Configure brake light strobe (optional)

Leave the purple wire connected to enable brake light strobing. To disable the strobe, disconnect and install the safety strobe module.

Step 14 — Install safety strobe module

Plug the safety strobe module into the harness connector.

Step 15 — Route wiring into bumper cavity

Route the wiring and connector into the center bumper cavity.

Step 16 — Prepare mounting bracket

Slide the provided clip nuts onto the brake light mounting bracket.

Step 17 — Install brake light into bracket

Insert the brake light into the bracket and secure it using the supplied screws.

Step 18 — Connect brake light wiring

Connect the safety strobe module to the brake light.

Step 19 — Install brake light into bumper

Carefully push the brake light assembly into the bumper opening.

Step 20 — Install support bracket

From behind the bumper, position the support bracket against the brake light bezel.

Step 21 — Secure brake light assembly

Secure the brake light and bracket using the supplied bolts and fasteners.

Step 22 — Secure wiring

Zip tie any loose wiring to prevent movement or rattling.

Step 23 — Reinstall lower bumper clips

Reinstall all plastic push clips removed from the underside of the bumper.

The installation is now complete. Enjoy your new 2022-2025 Subaru WRX 4th Brake Light Kit!


Questions About the Installation?

If you have any questions about installing the 2022-2025 Subaru WRX 4th Brake Light Kit, contact us via our support page.

Where Can I Buy the 2022-2025 Subaru WRX 4th Brake Light Kit?

If you're ready to upgrade your 2022-2025 Subaru WRX with the 4th Brake Light Kit, visit DiodeDynamics.com or use our Dealer Locator to find a dealer near you.

Want to know more about Diode Dynamics products? Visit DiodeDynamics.com and subscribe to our newsletter for new product releases and more!

This Installation Guide is for the following SKU: DD8067

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