Starter Motor
What it is
The starter motor is a powerful electric motor that cranks the engine to get it running. It draws a big burst of current from the battery for a few seconds at start-up.
What it does
It spins the engine fast enough to start combustion. A failing starter causes a single click, a grinding noise, or intermittent no-crank — different from a dead battery, which usually gives rapid clicking or no dash lights.
Symptoms of failure
- Single click (or nothing) when you turn the key
- Grinding or whirring without cranking
- Intermittent no-start that comes and goes
- Engine cranks slowly only when hot
- Smoke or a burning smell (rare, severe)
Which vehicles need it
Every vehicle. Heat soak near the exhaust is a common cause of hot-start failures.
Replacement cost
| DIY (part only) | $70–$250 |
|---|---|
| At a shop (parts + labor) | $300–$700 |
| Replacement interval | No set interval — often 100,000+ miles; replace on failure. |
| DIY difficulty | Moderate (DIY) — a couple of bolts and cables; access varies a lot by engine |
| Recommended brands | Bosch, Denso, Valeo, ACDelco |
Where to buy the part
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Frequently asked questions
Is it the battery or the starter?
A dead battery usually gives rapid clicking and dim or no dash lights. A bad starter typically gives a single click or grind with the lights staying bright. Tapping the starter and having it then crank is another classic clue.
Why does my car only fail to start when hot?
Heat-soaked starters draw more current and can fail to engage when hot, then work again once cooled. A hot-start no-crank with a healthy battery points to the starter.