How Often Should Oxygen Sensors Be Replaced?
2 Answers
Automotive oxygen sensors do not have a fixed replacement interval. Under normal conditions, they should be replaced every 100,000 kilometers. If the oxygen sensor is damaged or fails during use, it should be replaced immediately. Methods to determine the condition of an automotive oxygen sensor include: Visual Inspection: Primarily by observing the color of the oxygen sensor to judge its condition. Normally, the tip of the oxygen sensor should be light gray in color. White, black, or brown colors indicate an abnormal oxygen sensor. Resistance Measurement Method: Unplug the sensor connector, measure the resistance between two wires, and check if it falls within the appropriate range. Automotive Diagnostic Scanner Check: Start the vehicle and warm it up. The diagnostic scanner will display the oxygen sensor's voltage fluctuating between 0V and 1V. The faster the frequency, the better the sensor. If the voltage remains at 0V, 1V, or does not change, it indicates that the sensor is malfunctioning or aged and needs replacement. The price of oxygen sensors generally ranges between 150-400 RMB, with distinctions between front and rear oxygen sensors. It is recommended that vehicle owners who choose to purchase and replace the sensors themselves select the same model from reputable manufacturers.
I've been driving for most of my life, and oxygen sensors don't need to be replaced as frequently as engine oil. It's generally recommended to check whether they need replacement every 100,000 kilometers or so, as they tend to get clogged or wear out over time. Once a sensor fails, you'll notice a significant increase in fuel consumption, the engine light staying on constantly, and a drop in power—that's when you need to replace it immediately. Don't overlook this small component during regular maintenance; it helps control emissions and fuel efficiency, saving you a lot on gas money. From my experience, if you do a lot of city driving with frequent traffic jams, issues might arise as early as 80,000 kilometers. In rural areas with less driving, it can last longer. The key is to pay attention to your car's condition—don't wait for a major breakdown to act. Always play it safe by getting it checked at a reliable repair shop.
