Adaptive Xenon Internal Headlight Wiring Harness Set - E9x M3, E92/E93 328/335

Product Details

Restore reliability to your E9x Headlights with ECS Tuning’s Premium Replacement Harness Kit.

Headlight electrical issues are a common headache for many E9x owners. Over time, the factory wiring inside Pre-LCI BMW E92 and E93 3 Series headlights, as well as all E9x M3 models equipped with factory Xenon adaptive lighting, tends to become brittle and crack. This well-known problem can lead to flickering lights, adaptive headlight malfunction warnings, or even internal shorts that cause costly damage. With genuine Xenon headlights becoming increasingly scarce, maintaining them has never been more important.

ECS Tuning offers a long-lasting solution with its Headlight Wiring Harness Repair Kit, engineered specifically to eliminate this failure point. Each harness is built from modern, heat-resistant materials and fitted with pre-terminated, OEM-style connectors for a clean, straightforward installation. The result is improved reliability and restored confidence in your lighting system.

Don’t wait until your lights fail or an adaptive headlight error appears. Replace your deteriorating factory harness with ECS Tuning’s upgraded repair kit and keep your lighting system performing as it should.

Key Features

• Designed for Xenon Adaptive Headlights

• OE-style fitment with enhanced insulation to resist cracking and heat damage

• Complete set includes both left and right harnesses, plus integrated jump wire for full functionality

• Detailed installation instructions provided for easy DIY installation

Fitment & compatibility:

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

Kit Contents:

• Two headlight wiring harnesses (complete both left and right)
• 5x - heat shrink sleeves
• 18x - 22-24 gauge butt connectors

Product Development:

This headlight repair harness was developed, engineered, and quality-tested by ECS Tuning’s in-house Research & Development team. Every detail reflects ECS’s commitment to precision and durability, utilizing advanced tools and technology, including FARO laser scanning, SolidWorks 3D CAD modeling, in-house 3D printing for rapid prototyping, and long-term performance testing.

Installation & Support:

ECS Tuning provides a comprehensive installation guide that covers the entire process, from opening your OEM headlights to installing the new harness. 

- CLICK HERE FOR INSTLLATION INSTRUCTIONS -

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Kit Contents

Product Q&A

Lifetime Replacement

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