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How often should an Oxygen Sensor be replaced?
Oxygen Sensors have a long-life expectancy, however over time a sensor’s internal ceramic element will eventually age and its operation can become impaired. This may result in increased fuel consumption, and exhaust gas emissions, and reduced engine performance. Contamination by fuel and lubricant impurities such as silicones will also have a detrimental effect, as can excess vibration or impact by road debris.
Oxygen sensor function should therefore be checked during every major service interval. A visual inspection is recommended whenever the exhaust system is repaired and a full functional check carried out if any part adjacent to the sensor is involved. If the catalytic converter is being replaced it is recommended that the sensor be replaced at the same time.