Does the Oxygen Sensor Need Regular Replacement?
3 Answers
Oxygen sensors do not require regular replacement. Under normal circumstances, as long as the vehicle is properly maintained and not subjected to aggressive driving, the oxygen sensors can last up to 100,000 kilometers without issues. Typically, there are two oxygen sensors: the front oxygen sensor and the rear oxygen sensor. The front oxygen sensor is located before the catalytic converter and is used to adjust the air-fuel mixture concentration. The rear oxygen sensor is positioned after the catalytic converter and monitors its working condition. The oxygen sensor in a car is a feedback sensor in the fuel injection engine control system. Its function is to detect the oxygen concentration in the exhaust and send feedback signals to the ECU, which then adjusts the fuel injection quantity to maintain the air-fuel ratio near the theoretical value. Common faults of oxygen sensors include: 1. Oxygen sensor poisoning, usually caused by using leaded gasoline; 2. Internal wiring breakage; 3. Heater resistance wire burnout; 4. Ceramic cracking of the oxygen sensor.
The oxygen sensor in a car is responsible for monitoring exhaust oxygen levels, helping the engine optimize combustion and fuel consumption. As a long-time car enthusiast, I'd say it doesn't necessarily need regular replacement unless issues arise. Generally, its designed lifespan ranges from 100,000 to 150,000 kilometers. If the engine warning light isn't on and fuel consumption remains normal, there's no need for scheduled replacement. However, after prolonged use, the sensor may accumulate carbon deposits or wear out, affecting performance and emissions. I recommend checking it during routine maintenance as a precaution rather than replacing it blindly. Excessive replacement also wastes money and time. The key is to pay attention to the car's condition—if you experience difficulties starting the engine or notice unusual exhaust odors, it might indicate a sensor problem that should be addressed promptly.
I have extensive driving experience, and oxygen sensors indeed don't need regular replacement. They are part of the vehicle's electronic control system, primarily used to adjust the air-fuel ratio. During normal driving, if there are no symptoms like the check engine light coming on or sudden fuel consumption increase, the sensor can last well over 100,000 kilometers without issues. When I encountered a faulty sensor myself, the car ran roughly with reduced power, but replacing it restored normal operation. If it's not broken, don't fix it – regular emission and electronic system checks are more practical. Replacement costs aren't high, but there's no need to waste money either, as the manufacturer's manual doesn't mandate periodic replacement. Focus more on overall vehicle maintenance to ensure the sensor stays uncontaminated and undamaged.
