How to Replace Alternator 02-06 Nissan Altima
Difficulty: Intermediate · About 45 min · Nissan Altima
Replace the alternator, including moving the fuse box, on a 2002-2006 Nissan Altima.
Tools you will need
- Ratchet
- Socket extensions
- 5mm hex wrench
- 10mm socket
- 11mm socket
- 12mm socket
- 13mm socket
- 14mm wrench
- Pry bar
Parts and supplies
- Alternator
Steps
- Disconnect the battery and remove the engine cover
Disconnect the negative cable with a 10mm socket, then remove the engine cover's four 5mm Allen bolts and take it off.
- Remove the old alternator
Remove the alternator's two 10mm bolts and unplug its wiring harness, remove its 12mm bolt, slacken the belt with a 14mm wrench on the tensioner and slip it off, remove the upper 14mm bolt, move the fuse box aside after removing its cover and 10mm bolt, then remove the lower 14mm bolt and pry the alternator out.
- Install the new alternator
Set it in place, start the lower then upper 14mm bolts and tighten the lower one, insert the two 10mm bolts and the bracket, reconnect the wiring harness and the battery wire (tightening its nut), reposition the fuse box and its 10mm bolt and cover, then use the 14mm wrench on the tensioner to walk the belt back onto the alternator.
- Reconnect the battery
Reconnect the negative cable and confirm the alternator is charging once it's running.
- Reinstall the engine cover
Set it back in place and insert its four 5mm Allen bolts.
Check your vehicle’s repair manual for exact specifications and fit.