{"product_id":"1-8t-universal-ignition-coil-pack-replacement-harness-v4","title":"1.8T Universal Ignition Coil Pack Replacement Harness V4","description":"\u003ch2\u003eVW\/Audi 1.8T Coil Pack Wiring Harness (V4) – High Temp Ignition Harness Replacement\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFix Your 1.8T Misfire for Good\u003c\/strong\u003e – Replace your failing coil pack wiring harness and eliminate one of the most common ignition issues on VW\/Audi 1.8T engines.\u003c\/p\u003e\n\u003cp\u003eLooking for a reliable \u003cstrong\u003eVW 1.8T coil pack harness\u003c\/strong\u003e or \u003cstrong\u003eAudi 1.8T ignition wiring harness replacement\u003c\/strong\u003e? If you're experiencing \u003cstrong\u003emisfires, rough idle, or check engine lights\u003c\/strong\u003e, your \u003cstrong\u003e1.8T coil wiring harness\u003c\/strong\u003e is one of the most common failure points.\u003c\/p\u003e\n\u003cp\u003eThe factory \u003cstrong\u003eVW\/Audi 1.8T coil harness\u003c\/strong\u003e is known to crack and deteriorate over time due to extreme engine bay heat. This leads to poor electrical connections, causing \u003cstrong\u003eignition misfires, intermittent spark issues, and unreliable engine performance\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eOur \u003cstrong\u003eCarrot Top Tuning V4 1.8T Coil Pack Wiring Harness\u003c\/strong\u003e is a complete \u003cstrong\u003ewire-in ignition harness upgrade\u003c\/strong\u003e solution, designed to replace your failing \u003cstrong\u003eOEM 1.8T ignition harness\u003c\/strong\u003e with a significantly more durable solution.\u003c\/p\u003e\n\u003cp\u003eManufactured using \u003cstrong\u003ehigh-temp TXL automotive wire (rated up to 125°C \/ 257°F)\u003c\/strong\u003e and protected with \u003cstrong\u003e800°C silicone fiberglass heat shielding\u003c\/strong\u003e, this is the ultimate \u003cstrong\u003ehigh performance 1.8T coil harness\u003c\/strong\u003e for both stock and modified vehicles—including \u003cstrong\u003ebig turbo and top mount turbo setups\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eAdditionally, this V4 revision features a \u003cstrong\u003erelocated ground connection to the cylinder head\u003c\/strong\u003e instead of the valve cover. This provides a \u003cstrong\u003emore consistent ground, improved reliability, and moves the ground point away from high heat areas\u003c\/strong\u003e. It also works seamlessly with \u003cstrong\u003eshaved valve covers\u003c\/strong\u003e, making it ideal for both performance builds and clean engine bay setups.\u003c\/p\u003e\n\u003cp\u003eWe use \u003cstrong\u003eOEM-spec coil pack connectors\u003c\/strong\u003e to ensure proper fitment and secure connections, making this a true \u003cstrong\u003eOEM replacement coil harness for 1.8T engines\u003c\/strong\u003e—but built to outperform the original.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The \u003cstrong\u003eOEM VW\/Audi 1.8T coil pack wiring harness\u003c\/strong\u003e has been discontinued, making this upgraded replacement the best solution for long-term reliability.\u003c\/p\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eManufactured for durability and long-term reliability\u003c\/li\u003e\n\u003cli\u003eHigh-temp TXL wiring (125°C \/ 257°F rated)\u003c\/li\u003e\n\u003cli\u003e800°C silicone fiberglass heat shielding for extreme heat environments\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eRelocated ground to cylinder head for improved grounding and reduced heat exposure\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eEliminates \u003cstrong\u003e1.8T misfire issues caused by wiring failure\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-spec connectors\u003c\/strong\u003e for proper fitment and reliability\u003c\/li\u003e\n\u003cli\u003ePlug-and-play \u003cstrong\u003eignition harness upgrade\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePerfect for \u003cstrong\u003estock, big turbo, shaved valve cover, and high horsepower 1.8T builds\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x \u003cstrong\u003eVW\/Audi 1.8T Coil Pack Wiring Harness\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with \u003cstrong\u003eALL Volkswagen \u0026amp; Audi 1.8T engines\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits multiple platforms including \u003cstrong\u003eMK4 GTI, Jetta, Passat, Audi A4, TT, and more\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you've already replaced coils and spark plugs and are still chasing a misfire, your \u003cstrong\u003e1.8T ignition wiring harness\u003c\/strong\u003e is likely the issue. Upgrade to a \u003cstrong\u003ehigh-temp 1.8T coil harness\u003c\/strong\u003e and eliminate one of the most common failure points for good.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/LLHFjt0ldE0?si=coAcC7-MxlVOwb0M\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003ePinout Overview:\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1315\/4105\/files\/1.8T-INJ-HARNESS-V2_1.jpg?v=1763045954\" alt=\"VW Audi 1.8T Coil Harness Pinout Diagram\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1315\/4105\/files\/Screenshot_2025-11-13_at_18.00.01.png?v=1763046014\" alt=\"1.8T Coil Pack Harness Detail\"\u003e\u003c\/p\u003e","brand":"Carrot Top Tuning","offers":[{"title":"Default Title","offer_id":44278081978451,"sku":"1.8T-HARNESS-034M-V4","price":100.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1315\/4105\/files\/IMG_9969-Enhanced-NR.jpg?v=1774522577","url":"https:\/\/www.carrottoptuning.com\/en-au\/products\/1-8t-universal-ignition-coil-pack-replacement-harness-v4","provider":"Carrot Top Tuning","version":"1.0","type":"link"}