How to Replace Serpentine Drive Belt 02-06 Nissan Altima L4 2.5L
Difficulty: Intermediate · About 4 min · Nissan Altima
Replace the serpentine belt on a 2002–2006 Nissan Altima 2.5L by removing the passenger wheel and splash shield, following the belt diagram, and checking every pulley groove.
Tools you will need
- 14mm Wrench
- 21mm Socket
- Jack Stands
- 10mm Socket
- Ratchet
- Floor Jack
- Torque Wrench
Parts and supplies
- Correct replacement serpentine belt
Steps
Raise the passenger side
Loosen the wheel nuts on the ground, then raise and support the vehicle securely. Remove the wheel and the access splash shield.
Record and release belt routing
Photograph the belt path and compare it with the underhood diagram. Rotate the tensioner to release slack, slip the belt off, and ease the tensioner back slowly.
Route the replacement belt
Guide the new belt around each pulley according to the diagram, leaving the tensioner pulley for last. Rotate the tensioner and seat the belt over the final pulley.
Check belt seating
Release the tensioner slowly and inspect every ribbed pulley to confirm the belt is centered in its grooves. Refit the splash shield and wheel, tightening wheel nuts to specification.
Verify operation
Start the engine briefly and watch the belt track without reaching near moving parts. Shut the engine off if the belt wanders, squeals, or rides outside a pulley.
Check your vehicle’s repair manual for exact specifications and fit.