Volkswagen Audi Passat Rear Oxygen Sensor 0258030129 04E906262BJ Universal Exhaust Gas Monitoring

This replacement uses an OEM-consistent zirconia ceramic sensing element and high-temperature stainless steel housing; internal circuitry is optimized for anti-interference, with signal response speed and long-term stability essentially equal to original parts; durability is sufficient for daily use. OEM number 0258030129; fits Volkswagen Passat, Audi A4/A6 and other EA211/EA888 engine platforms; also compatible with 04E906262BJ and 04E906262EA numbers. Function: monitor exhaust oxygen content and feed ECU to adjust the air-fuel ratio to ensure emissions compliance and fuel economy. Replacement difficulty: medium; use a specialized socket to remove the old sensor; avoid thread damage; cold-start operation and anti-seize recommended; skilled technicians can complete in about 15 minutes.