Also Known As: Lambda Sensor Oxygen Sensor O2 Sensor Wideband Wide Band. VERY IMPORTANT. - Direct Fit Wideband Oxygen SensorPORSCHE CAYENNE S 4.8. The Oxygen (Lambda) sensor is a sensor fitted in the exaust system which monitors the exhaust gasses and lets the ECU know if any changes in are needed in the air/fuel mixture.
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