Audi Series Oxygen Sensor 0258017232 079906262R Precisely monitors exhaust air-fuel ratio

This replacement uses zirconia ceramic sensing element and stainless steel welded housing, matching original equipment standards; durable and corrosion-resistant, with lifespan measured at over 90% of OEM. OEM numbers 0258017232, 079906262R; fits Audi A4/A6/Q5 (2.0T), VW Magotan/Passat (EA888 Gen3) and other models. Function: accurately monitors exhaust air-fuel ratio, provides real-time oxygen concentration signals to ECU to ensure catalytic converter efficiency. Installation difficulty: medium; use a 22mm special wrench to remove the old part; avoid thread seizing; operate with engine cold and apply anti-seize compound.