Description
VW/Audi 1.8T Coil Pack Wiring Harness (V4) – High Temp Plug & Play Ignition Upgrade
Dealing with misfires, rough idle, or random check engine lights on your VW/Audi 1.8T? If coils and spark plugs didn’t fix it, the issue is often your failing coil pack wiring harness—a well-known weak point on these engines.
The Carrot Top Tuning V4 1.8T Coil Pack Wiring Harness is a complete plug-and-play replacement designed to eliminate ignition issues caused by heat-damaged factory wiring. Manufactured using OEM-spec connectors and extreme high-temp materials, this harness is engineered to outperform and outlast the original or the other units currently on the market.
Why Your 1.8T Coil Harness Fails
- Factory insulation becomes brittle and cracks from engine bay heat
- Intermittent wiring causes misfires and ignition breakdown
- Heat from turbo setups accelerates harness failure
- Replacing coils alone won’t fix underlying wiring issues
V4 Carrot Top Tuning Upgrade
- 800°C Rated Fiberglass Silicone Shielding – Superior heat protection vs standard braided loom from competitors.
- Full Length Replacement – Runs all the way back to the ECU
- DTM Connector Integration – True plug-and-play connection at the head
- OEM-Spec VW/Audi Connectors – Reliable fit and long-term durability
- Relocated Ground Point – Moved to cylinder head for improved grounding and reduced heat exposure
Built for High Heat & Performance Applications
This isn’t just a replacement—it’s a complete redesign of one of the most failure-prone components on the 1.8T platform. The upgraded fiberglass silicone shielding provides exceptional resistance to extreme temperatures, making it ideal for big turbo and top mount setups.
Whether you’re running a stock setup or a high-performance build, this harness is designed to be reliable under any condition.
What’s Included
- 1× V4 1.8T Coil Pack Wiring Harness (Plug & Play)
- Pre-installed VSS Connector
Pinout Information
Driver Side Body Harness Connector:
- Black – Pin 7
- Orange – Pin 2
- Grey – Pin 3
ECU Side Connector:
- Purple – Pin 102
- Brown – Pin 103
- Blue – Pin 94
- Yellow – Pin 95
- White – Pin 121
Vehicle Compatibility
✔ Compatible with ALL Volkswagen / Audi 1.8T engines
⚠ Important Notes:
• Not a direct bolt-on for Audi A4 models
• Can be used with minor wiring modification
• Reference OEM part number for additional install guidance if needed
Fix It Right the First Time
The 1.8T coil harness is one of the most common failure points on these engines. Stop chasing electrical issues—replace it with a proper high-temp solution and restore reliable ignition performance.
Designed by enthusiasts for enthusiasts. Built to be bulletproof.
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