For 2002 2003 Mazda Protege/ Protege5 2.0L L4 Upstream Oxygen O2 Sensor 234-4721
24,12 €
Q: How do I know the O2 sensor is good or not?. We try and make them as accurate as we can. If the sensor is good, further diagnosis is required. There're many different codes for specific functional failures, which are NOT necessarily relevant to the sensor.
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