How to Replace O2 Oxygen Sensor 02-06 Nissan Altima
Difficulty: Intermediate · About 2 min · Nissan Altima
Replace the oxygen sensor on a 2002–2006 Nissan Altima with the exhaust cold, starting the new sensor by hand and routing its lead away from hot components.
Tools you will need
- 7/8 Inch Socket
- O2 Sensor Socket
- Ratchet
- Flat Blade Screwdriver
Parts and supplies
- Correct replacement oxygen sensor
Steps
Disconnect the old sensor
Allow the exhaust to cool fully and unplug the oxygen-sensor connector. Release the wiring clips so the lead can move freely during removal.
Remove the sensor
Use an oxygen-sensor socket to loosen the sensor from its bung. Inspect the threads and avoid contaminating the exhaust opening.
Install the replacement sensor
Start the replacement by hand to avoid cross-threading, then tighten it to the vehicle specification. Do not contaminate the sensing tip or wire.
Reconnect and inspect
Reconnect the electrical plug and restore the wire to its retainers. Start the engine and check for exhaust leaks while ensuring the lead stays clear of hot parts.
Check your vehicle’s repair manual for exact specifications and fit.