Volkswagen Audi A3 1.6L 2003-2007 Rear Oxygen Sensor 03C906262BM Direct replacement, efficient and stable

This replacement part has material and process closely matching OEM: high-temperature ceramic probe and corrosion-resistant stainless steel housing; tested on a bench; withstands exhaust high temperature and vibration. OEM 03C906262BM; fits VW/Audi A3 1.6L 2003–2007. Function is to monitor oxygen content in exhaust and feedback to ECU to adjust air-fuel ratio; replacement is moderate difficulty; remove old sensor and carefully thread in the new one to avoid thread stripping or wire strain; use a dedicated socket.