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Old 10-16-2011, 03:55 PM
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bennyb53 bennyb53 is offline
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2019 Sentra
2002 Altima
 
Join Date: Jan 2011
Location: Hawaii
Posts: 2,105
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1. Remove the engine cover.
2. Remove the heat shield. At this point it probably expose the upstream (pre-cat) sensor. From here, determine how much room you have, Try how easy to reach the sensor and with a socket wrench role play the removal process. This will give you an idea whether to remove the cowl or not. Also might need some lighting. Try to access from underneath also.

COWL: You see that black plastic running from driver to passernger side at the base of windshield. And under your windshield wiper arm. To remove the arm, remove cover at the base and you will see the holding nut (12-14mm?). Be careful cowl is fasten with plastic clips to the metal under it.

O2 Sensor Socket: Mostly likely 7/8" (22mm) 3/8" DR, $8-$9. O'Reilly and others have a loaner program. Just make deposit and you get it back when you return.

Just like my Altima, NGK/NTK maybe OEM sensor on your car. Connector and anti-seize comes with it.

Uninstall: Just pinch the release tab on the wiring harness side and it should come off. Whe connecting the new sensor, also pinch the release tab so sensor side of connector will just slide in and lock.

Last edited by bennyb53; 10-16-2011 at 03:57 PM.
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