Exterior Components Lights and Components

C-light

DRL Deactivator with High Beam Function

$19.95

SKU: DD4055

In Stock
In Stock
Ships by Aug 3
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30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Diode Dynamics DRL Harness is specifically designed to integrate with Diode Dynamics C-Light Switchback LED Boards for the 2015-2021 Subaru WRX and 2015-2017 Subaru STI. This module enables your vehicle's C-lights to serve as the daytime running lights (DRLs), automatically deactivating the stock DRLs to power the C-lights. Your high beam functionality is unaffected by this installation. It also incorporates embedded circuit protection, contributing to its high reliability and longevity. The product is manufactured in St. Louis, Missouri, by Diode Dynamics Manufacturing and comes with a 3-year manufacturer warranty. This harness is compatible with the 2015-2021 Subaru WRX models. For the Subaru STI, it is compatible with the 2015-2017 model years; it is explicitly not compatible with the 2018-2020 STI models.

MIA's Description

It deactivates the factory DRLs and powers the C-Light instead, while high beam function remains normal.

Fitment

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Specifications

BrandC-light
Part NumberDD4055
CategoryExterior Components

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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