Audi Oxygen Sensor 1K0998262E, 0258006984 (Universal, compatible with 06K906262AK)

Vehicles with EA888 engines such as Audi A3, A4, Q3 share a universal oxygen sensor OEM 1K0998262E (compatible with 0258006984 and 06K906262AK). Installed on pre-cat or front exhaust pipe; monitors exhaust oxygen to precisely adjust air-fuel ratio. Replacement difficulty medium; labor 0.5–1 hour; avoid damaging threads or wiring. If idle is unstable, fuel consumption rises, or acceleration weakens, replacement is typically required.