Altima 2.5 SL L4-2.5L (QR25DE) (2002)
13. Use compressed air to remove any remaining debris.
CAUTION:
DO NOT perform this step if the procedure is being done on the vehicle (Method #1). Doing so may cause metal debris to enter the engine cylinders.
14. If metal debris remains trapped in the boss threads, use a spiral nylon brush to remove it.
15. Tilt the manifold/catalyst/front tube so that the metal debris falls out of the part.
16. Apply compressed air through the boss to blow out any remaining debris.
CAUTION:
DO NOT perform this step if the procedure is being done on the vehicle (Method #1). Doing so may cause metal debris to enter the engine cylinders.
17. Install the new sensor as described in the applicable Electronic Service Manual (ESM).