Volkswagen Audi Oxygen Sensor 234-5107 Z05079601G Precise Air-Fuel Ratio Environmentally Friendly Emissions

This replacement part uses the same zirconia ceramic sensing element and high-temperature resistant stainless steel housing as the original equipment, sealed by laser welding. It shows comparable resistance to thermal shock and long-term stability to the factory part, effectively preventing signal drift caused by sensor aging. OEM numbers correspond to 234-5107 and Z05079601G, compatible with VW EA888 series engines in models such as Magotan, Passat, and Audi A4L. Functionally, it monitors the oxygen content in the exhaust and feeds the signal to the ECU to adjust fuel injection pulse width, ensuring the air-fuel ratio remains at the theoretical 14.7:1 to meet emission standards. Installation difficulty is moderate; it requires removal of the front section of the exhaust pipe oxygen sensor housing. Use a dedicated socket, and avoid wire tugging or thread stripping.