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How to Replace the Oxygen Sensor in a Mazda Miata

The Mazda Miata contains two oxygen sensors. The sensors are located on each end of the catalytic converter; they help control the fuel consumption based on the amount of oxygen in the cars exhaust system. If the "check engine" light has come on, or if your cars gas mileage has decreased, change the sensors to ensure that your vehicles emissions ratings and fuel budget stay low.

Instructions

1

Start the Miatas engine and let it warm up. Turn off the engine and remove the key from the ignition. Raise the Miata with a jack. Rest the car on a set of jack stands. Locate the oxygen sensors on either side of the catalytic converter.

2

Press in the locking tab to release the wiring harness connection. Pull the connectors apart. Remove the sensor with a ratchet and oxygen sensor socket.

3

Thread the new sensor in its place, by hand, until it is secure. Tighten it with a ratchet and oxygen sensor socket. Press the wiring harness connection into place.

4

Raise the car with the jack to remove the jack stands from beneath the car. Lower the Miata to the ground.