Description
Audi B5 S4 Engine Harness
Audi B5 S4 engine harnesses are available from various sources, including new and used original equipment manufacturer (OEM) units and aftermarket replacement or upgrade kits.
New & Aftermarket Options for Audi B5 S4 Engine HarnessJAE Innovations Audi B5 S4 2.7t Replacement Engine Harness: This is a full replacement harness, also functional for single turbo swaps, and contains all necessary sensor connectors. Note that this item is often on a waitlist due to demand.
- JAE B5 S4 Coilpack Wiring Harness kit: This partial harness is designed to upgrade the stock 3-pin coilpacks to 2.0t/R8 coilpacks and eliminates the original wiring for that section. It connects directly into the ECU box and lays over the existing harness.
- OEM Audi Parts: Genuine new OEM engine wiring harnesses for the Audi S4 are listed on the official Audi Parts USA website, but availability for the specific B5 chassis part may vary, so checking with a retailer like Audi Brooklyn is recommended. Part numbers for harnesses vary by year and transmission type (e.g., 8D2971072 for an A4 B5/S4 harness, though specific S4 part numbers may differ).
- Rada Race Lab VR6 Engine Swap Harness Kit: This is a specialized aftermarket option for those performing a VR6 engine swap into a B5 S4 chassis, designed for use with specific standalone ECU
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