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The O2 sensor(s) on your vehicle are designed to sense Oxygen in the exhaust stream. When they sense too much "air", they richen up the mixture and when the don't sense enough "air", they lean out the fuel mixture. Under normal conditions, they should last you 60-80K miles. However, we all drive in varying traffic conditions so the life of the O2 sensor is diminished. We recommend that you change the O2 sensor(s) every 60K miles to keep your engine running in optimal condition. (This includes the regular service intervals and tune-up schedules.)
 
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