Electrical
Starter vs Alternator: How to Tell Which One Failed
AutoDoc Repair Team April 7, 2024
Clicking sounds usually point to electrical issues. We show you how to test.
Authentic Automotive Guide
Introduction
If your car won't start, people usually guess 'The Starter' or 'The Alternator'. They do very different things!
The Difference
- Starter: Only works to physically spin the engine to start it.
- Alternator: Generates power while the engine is running to charge the battery.
The Test
If you jump-start the car and it stays running, it's likely a bad battery or starter. If you jump-start it but it dies as soon as you remove the cables, your alternator is dead.
Costs
Starter: $300-$500. Alternator: $400-$800. Both are relatively accessible for DIYers.
Accurate Repair Costs
Estimates are based on average 2024 repair data in the USA — Labor & Parts included.
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