This wiring harness is required for the retrofit of the OEM rain sensor and the auto-dimming interior mirror for the following vehicles: VW Golf 4 VW Bora VW Passat 3B VW Passat 3BG Audi A3 8L Easy commissioning in minimal time This wiring harness establishes the connection between the two components with the central electronics as well as the WIWA relay and ground Scope of delivery: 1x wiring harness kit