* Alternator: $100-$200
* Water pump: $50-$100
* Serpentine belt: $20-$30
* Coolant: $10-$20
Labor
* Labor to replace alternator: 1-2 hours
* Labor to replace water pump: 2-3 hours
Total cost
The total cost of parts and labor to change an alternator and water pump on a 1996 Nissan Altima will be approximately $300-$600.