O2 Lambda Sensor for Mini Clubman R55 R56 R57 R59 One Cooper S JCW Rear Downstream Oxygen Sensor Probe Vehicle-specific with Connector, 11787548961

1. Note❗ -- This is the rear (downstream) oxygen sensor, which is usually installed behind the three-way catalytic converter. Its main task is to monitor the working effect of the three-way catalytic converter. 2. Differentiate and identify -- Oxygen sensors are divided into front and rear (upstream and downstream) oxygen sensors. They have different functions and different installation positions. Pay attention to identification when purchasing. 3. The part number is the safest way to confirm! (The part number and compatible vehicle information are in the page details. If the vehicle information is compatible, but the part number is not compatible, please refer to the part number!) 4. Damage to the oxygen sensor will cause black smoke from the exhaust, unstable idle speed, excessive fuel consumption, power loss, engine lag... up to 19 faults. It should be replaced as soon as possible. 5. Functional and quality testing meets the same standards as original parts: high performance and reliability over a long service life.