Alternator Replacement
Shop Cost
$600
DIY Parts
$200
You Save
$400
Tools Required (5)
Socket set
Wrench set
Serpentine belt tool
Multimeter
Pry bar
Parts & Consumables
AlternatorSerpentine belt
Pro Tip Test first: 13.8-14.4V at battery with engine running = good.
🚗 Vehicle-Specific Notes
Honda
Usually accessible from top. 14mm pivot bolt, 12mm adjustment. Easy job.
Ford
Ecoboost: cramped. May need to remove intake components for access.
Toyota
Accessible from top on 4-cyl. V6 may need to remove air intake.
Subaru
Accessible from top. 12mm and 14mm bolts. Route belt before tightening.
BMW
Water-cooled alternator on some models. More complex. Check coolant lines.
Extra tools: Coolant catch pan
Chevrolet
Trucks: very accessible on top. 15mm bolts. 10mm for electrical connections.