Diode Dynamics

Diode Dynamics 15-21 Ford Mustang 4th Brake Light

$79.95

Skip to product information
1 of 8

Diode Dynamics 15-21 Ford Mustang 4th Brake Light

Out of stock


Regular price $79.95
Sale price $79.95 Regular price
Shipping calculated at checkout.

  • Fully secure checkout
  • Trusted by thousands
  • Rated and reviewed

Order before 4pm for Same Day Shipping

I18n Error: Missing interpolation value "end_date" for "Ends on {{ end_date }}"

Sorry, it's out of stock.

But we can let you know when it's back in.

Question about this product?

We're happy to help.

Sold out
FeaturesCompatible with Ford Mustang 2015-2023Converts reverse light to also function as a running light and 4th brake lightOEM connectors and wiring harness for simple plug-and-play installationAssembled in USAOverviewCustom Appearance. If you're looking for a way to make your S550 Mustang stand out here's a perfect solution! The Diode Dynamics 4th Brake Light Kit converts your factory reverse light to shine both bright white and red. Not only do you get an upgraded backup light you can also add a red running and brake light for a unique modern look on the road.Red Running Light: The red light comes on at 50% brightness anytime you have your parking lights or headlights on to serve as a rear fog lamp. This provides a distinct appearance at night complementing the factory LED tail lights.4th Brake Light: When you hit the brakes the red light powers at full brightness to serve as a supplementary brake light for greater visibility and a unique look.White Reverse Light: Anytime you're in reverse the red shuts off completely so your backup light can illuminate in a crisp white color. There is no change to the factory reverse function you just get an improved output from the white LED!Easy Installation. Using OEM connectors and the included wiring harness this kit is 100% plug-and-play and installs in minutes. Actual installation time is less than 20 minutes. This is one of the easiest ways to make your Mustang stand out on the road!Reliable Operation. This module has been designed with quality components custom-tooled OEM-grade connectors and includes embedded circuit protection for high reliability over time. It is proudly assembled in St. Louis Missouri by Diode Dynamics Manufacturing.
Installation Instructions

Score 1
Score 2


  • Fast shipping

    Ordered a product and it arrived the next day. Super impressed with the speed and the careful packaging.


    Jordan Smith
    Seattle, Washington
  • Excellent service

    Customer support was helpful; they resolved my issue in minutes. Really appreciated the follow-up email to ensure satisfaction.


    Taylor Christos
    Austin, Texas
  • Great selection

    Wide variety of products across the range. Found everything I needed in one place, very convenient.


    Alex Williams
    London, England
  • Top quality

    The product I bought exceeded my expectations. Top-notch quality, thoughtful design, and it came beautifully packaged.


    Sam Davis
    San Francisco, California
  • Reliable store

    Have ordered multiple times, always received exactly what was described. Products are genuine and fully functional.


    Casey Brown
    Denver, Colorado
  • User-friendly website

    Easy to navigate and make purchases. A hassle-free shopping experience with clear descriptions and transparent pricing.


    Riley Wilson
    Boston, Massachusetts
  • Smooth checkout

    Checkout was quick and straightforward. My order confirmation came through instantly, and everything arrived exactly as expected.


    Morgan Lee
    Portland, Oregon
  • Great value

    Really pleased with the quality for the price. The product felt premium, worked perfectly out of the box, and was well packaged.


    Jamie Carter
    Manchester, England
1 of 8