VW Audi Front Oxygen Sensor 1K0998262B 0258006902 234-4809 Direct Replacement

If your vehicle experiences rough idle, weak acceleration, increased fuel consumption, or the engine fault light (such as P0130, P0135) is on, the upstream oxygen sensor may be aging or failed. This sensor normally monitors the oxygen content in exhaust and feeds the signal to the ECU to precisely control the air-fuel ratio, ensuring combustion efficiency and emissions compliance. This product is a direct replace­ment for Volkswagen/ Audi models, compatible with OEM numbers: 1K0998262B, 0258006902, and compatible with 234-4809. When installing, operate on a cold engine to avoid burns; after removing the old sensor, clean carbon buildup from the exhaust manifold threads and apply a small amount of anti-seize agent before installing the new part, to prevent seizing at high temperatures.