O2 Sensor, Front (OEM-Bosch) for B6-A4 and C5-A6 3.0L V6

These front O2 sensors are OEM Bosch replacements for the B6-A4 with the 3.0L V6. We highly recommend replacing both as a pair.

Please note, when diagnosing your vehicle: Bank 1 = passenger’s side/right, and Bank 2 = driver’s side/left.

2 per vehicle, adjust the quantity to 2 at checkout if you want both.

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