Genuine OEM Volkswagen Wiring Harness Adapter, part number 12E971579. This adapter is used to connect or extend wiring harnesses, ensuring proper electrical flow between different vehicle systems. It is located within the vehicle's electrical system, often near the HVAC unit. The adapter features precise connector designs for a secure fit. Genuine OEM wiring harnesses and adapters guarantee correct pin configurations and material quality, preventing electrical faults and ensuring system reliability.