Description
VW/Audi 1.8T Coil Pack Wiring Harness (V4) – High Temp Ignition Harness Replacement
Fix Your 1.8T Misfire for Good – Replace your failing coil pack wiring harness and eliminate one of the most common ignition issues on VW/Audi 1.8T engines.
Looking for a reliable VW 1.8T coil pack harness or Audi 1.8T ignition wiring harness replacement? If you’re experiencing misfires, rough idle, or check engine lights, your 1.8T coil wiring harness is one of the most common failure points.
The factory VW/Audi 1.8T coil harness is known to crack and deteriorate over time due to extreme engine bay heat. This leads to poor electrical connections, causing ignition misfires, intermittent spark issues, and unreliable engine performance.
Our Carrot Top Tuning V4 1.8T Coil Pack Wiring Harness is a complete wire-in ignition harness upgrade solution, designed to replace your failing OEM 1.8T ignition harness with a significantly more durable solution.
Manufactured using high-temp TXL automotive wire (rated up to 125°C / 257°F) and protected with 800°C silicone fiberglass heat shielding, this is the ultimate high performance 1.8T coil harness for both stock and modified vehicles—including big turbo and top mount turbo setups.
Additionally, this V4 revision features a relocated ground connection to the cylinder head instead of the valve cover. This provides a more consistent ground, improved reliability, and moves the ground point away from high heat areas. It also works seamlessly with shaved valve covers, making it ideal for both performance builds and clean engine bay setups.
We use OEM-spec coil pack connectors to ensure proper fitment and secure connections, making this a true OEM replacement coil harness for 1.8T engines—but built to outperform the original.
Important: The OEM VW/Audi 1.8T coil pack wiring harness has been discontinued, making this upgraded replacement the best solution for long-term reliability.
Key Features:
- Manufactured for durability and long-term reliability
- High-temp TXL wiring (125°C / 257°F rated)
- 800°C silicone fiberglass heat shielding for extreme heat environments
- Relocated ground to cylinder head for improved grounding and reduced heat exposure
- Eliminates 1.8T misfire issues caused by wiring failure
- OEM-spec connectors for proper fitment and reliability
- Plug-and-play ignition harness upgrade
- Perfect for stock, big turbo, shaved valve cover, and high horsepower 1.8T builds
What’s Included:
- 1x VW/Audi 1.8T Coil Pack Wiring Harness
Fitment:
- Compatible with ALL Volkswagen & Audi 1.8T engines
- Fits multiple platforms including MK4 GTI, Jetta, Passat, Audi A4, TT, and more
If you’ve already replaced coils and spark plugs and are still chasing a misfire, your 1.8T ignition wiring harness is likely the issue. Upgrade to a high-temp 1.8T coil harness and eliminate one of the most common failure points for good.
Pinout Overview:
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