What’s the difference between a starter and an alternator?

The starter uses energy from the battery to get your car’s engine turning when you turn the key (or push the start button). The alternator, on the other hand, keeps your vehicle going. It converts mechanical energy from your running engine into electricity to power systems like headlights, fans, and air conditioning, while also recharging your battery as you drive.

How do you know if you have a starter problem?

• Single click vs. rapid click - A single click when starting usually points to the starter, while a rapid clicking sound is more likely a dead battery.

• Lights on but no go - If your lights turn on but your car won’t start, the starter could be the issue.

• Jump doesn’t work - If jump-starting doesn’t get your vehicle going, there’s a good chance the starter has failed.

How do you know if you have an alternator problem?

• Engine won’t start - Difficulty starting is often a sign of alternator trouble.

• Battery continues to die - Since the alternator charges your battery, repeated battery failure often indicates an alternator issue.

• Lights flickering - Headlights or dashboard lights that dim or flicker may signal alternator problems.

• Grinding or whining - Failing alternators can produce persistent whining or grinding noises.

• Smell of burning rubber - Alternator problems sometimes cause belts to slip, producing excess heat and a burning smell.

How long should a starter and alternator last?

As with most components, lifespan depends on usage and conditions. On average, starters and alternators last 6-10 years, or between 80,000-150,000 miles. Replacing them in a timely manner helps prevent being stranded without power and keeps your car’s essential systems functioning.