2015-2023 Ford Mustang 4th Brake Light-dd3017
2015-2023 Ford Mustang 4th Brake Light-dd3017
2015-2023 Ford Mustang 4th Brake Light-dd3017
2015-2023 Ford Mustang 4th Brake Light-dd3017
2015-2023 Ford Mustang 4th Brake Light-dd3017
2015-2023 Ford Mustang 4th Brake Light-dd3017


2015-2023 Ford Mustang 4th Brake Light

Regular price$108.00 CAD

One (1) module, with wiring harness
One (1) 3157 red/white switchback bulb
One (1) mini-screwdriver

Quantity: One (1)
Warranty: 3 year warranty

  • Free shipping within Canada on orders over 150$
  • Special Order Item, Usually Ships Within 3-7 Business Days


  • Converts reverse light to also function as a running light and 4th brake light
  • OEM connectors and wiring harness for simple plug-and-play installation
  • Assembled in USA


Custom 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.


    Operating Voltage: 9-16V
    Operating Temperature: -40C to 85C (-40F to 185F)
    Connector(s): OEM-Size Plug and Play
    Shipped Weight (lb): 0.97


    NOTE: If you would like to install both the Sequencer and 4th Brake Light, the 4th Brake Light Module must be wired to the vehicle harness, then connected to the Sequencer Module, and finally connected to the tail light.

    Vehicle Connector → 4th Brake Module → Sequencer → Tail Lamp

    If the 4th brake light pin installation is too difficult, you may want to replace the OEM pigtail. OEM Pigtail Part Number: 3U2Z-14S411-FHAB


    NOTE: This module is compatible with USDM models only - it is not compatible with EU/AU Mustangs.

    For the 2019+ GT/GT350 model, minor modification to the factory connector is required for proper fitment.

    Make: Ford
    Model: Mustang
    Years: 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023
    Electrical Compatibility: No electrical issues (tested and confirmed)