ECS Tuning E9X Adaptive Xenon Internal Headlight Wiring Harness (Single Headlight)

Solve common E9x headlight electrical issues with a high-quality, long-lasting replacement harness.

If you own a Pre-LCI BMW E92 or E93 3 Series or any E9x M3 with factory Xenon adaptive headlights, you're likely familiar with a frustrating issue: brittle, cracking headlight wiring insulation. This common failure can cause intermittent lighting issues, malfunction warnings, and internal shorts that lead to expensive repairs. There are only so many genuine Xenon Headlights out in the wild, and even though the internal wiring is extremely prone to failure, it is our duty to keep them going!

The ECS Tuning Headlight Wiring Harness is a direct replacement solution engineered to address this weak point with upgraded materials and a straightforward installation process. Built using modern, heat-resistant insulation and pre-terminated OEM-style connectors, this harness brings reliability back to your headlight system.

Don’t wait for flickering lights or adaptive headlight errors to leave you in the dark. Replace your aging, failure-prone factory headlight wiring with ECS Tuning’s high-quality harness and restore confidence in your lighting system.

Key Features:

• Designed for Xenon Adaptive Headlights.
• OE-Style replacement with upgraded durability to resist heat damage and cracking.
• One set covers both left and right headlight harnesses, including the integrated jump wire required for full functionality.
• Detailed installation guide included.

Fitment & compatibility:

• All E90, E92, E93 M3
• E92 Pre-LCI 328i, 328xi, 335i
• E92 Pre-LCI 328i, 335i

Kit Contents:

• One headlight repair harness (fits left or right)
• 3x - heat shrink sleeves
• 9x - 22-24 gauge butt connectors

Product Development:

• Our Headlight wiring repair harness was designed, engineered, tested, and quality inspected by our Research and Development team. We strive for nothing but the highest level of precision and quality through leading-edge product development technology, including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

Install and Support:

• Looking for installation tips? Look no further, we supply a full installation tutorial from start to finish, including how to disassemble your OEM headlights! See our Installation PDF under the INSTALLATION Tab for more information.