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To replace the front O2 sensor on a 2001 Pontiac Aztek, first, ensure the engine is off and cool. Locate the sensor on the exhaust manifold and disconnect the electrical connector. Use an O2 sensor socket or a wrench to unscrew the old sensor, then install the new sensor by threading it in and tightening it securely. Finally, reconnect the electrical connector and start the engine to check for proper operation.

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5mo ago

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