Your probably going to have only one serpentine belt, and that will take care of it. If there is a chance that you do have more than one belt, then the rule of thumb is to replace them all at the same time.
the vehicle needa a new voltage regulater,this should have been checked before battery and alternator as its the cheapest part to replace
You should have your rotors checked and possibly turned or replaced as necessary You should have your rotors checked and possibly turned or replaced as necessary
The computer only resets when the battery is removed. The alternator just charges the battery, so if the battery is left connected when the alternator is replaced, the computer should not reset.
It should cost between 500-700 based on the brand of the alternator and the shop.
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. The alternator should have 2 connections.
The 'oxygen sensor'may need to be replaced on '96 Sentra when the check engine light comes on. The should be replaced on the '96 Sentra every 100k miles for better fuel efficiency and to protect the converter.
Try jumping it off. If it cranks remove the + side on the battery. If it shuts off the alternator is bad .If it does not shut off clean the battery terminals . Have the battery checked at the Auto Zone.
Normally it will last the life of the engine and is replaced when the engine is overhauled.
nissan micra has timing chain or cam chain and should be replaced at 200.000k
Break pads should be checked if not replaced. Check condition of rotors at the same time.
If a washer pump was replaced on a Jeep Wrangler and is still not working the fuses should be checked. The washer switch should also be checked as it could also be causing the pump not to work.
If the light remains on then the system still isn't charging as it should. Check the plug on the alternator and also that the wires to the alt have a good connection.