The classic sign of a bad starter is a single loud click when you turn the key while the dash lights stay bright. Other signs include grinding, a whirring sound with no cranking, starts that work only some of the time, and smoke or a burning smell from under the car. If the lights dim badly or you hear rapid clicking, suspect the battery first.
The 7 symptoms
1. One click, then nothing
The solenoid engages but the motor doesn't turn. With bright dash lights, this points squarely at the starter or its relay.
2. No sound at all
Could be the starter, the starter relay, a fuse, the ignition switch or a neutral safety switch. Try starting in Neutral to rule out the switch.
3. Grinding noise
The starter gear isn't meshing properly with the flywheel. Ignoring it can damage the flywheel, a far bigger repair.
4. Whirring or spinning, but the engine doesn't turn
The starter motor spins but the gear isn't engaging the engine.
5. Intermittent starting
Works one day, not the next. Worn contacts inside the starter often behave like this before failing completely.
6. Slow cranking with a good battery
If the battery tests fine and cables are clean, a dragging starter may be drawing too much current.
7. Smoke or burning smell
A starter that keeps getting power, or that's been cranked too long, can overheat. Stop trying and get it checked.
Starter or battery? Quick checks
- Headlights on, try to start. Lights stay bright with one click: starter. Lights go dim with rapid clicking: battery.
- Try a jump. If a good jump doesn't help and you still get a single click, the starter is the suspect.
Our guide to car clicks but won't start explains the sounds in detail, and car won't start: 9 common causes covers the rest.
Don't forget the alternator
A starter needs a charged battery, and the battery needs a working alternator. If the battery keeps going flat, check the charging system too. See mobile alternator replacement.
How mobile starter replacement works
Test the battery and confirm voltage reaches the starter
Disconnect the battery
Remove the starter (from above or below, depending on the vehicle)
Install the new or remanufactured starter and reconnect
Test several starts
On many vehicles this takes one to three hours in a driveway. Some engines bury the starter under the intake, which adds time.
What it costs
Broadly $300 to $900 installed for many cars and light trucks, depending on the part and how hard it is to reach. Get a written quote that says whether the part is new or remanufactured and what the warranty covers.
Frequently asked questions
How long do starters last?
Often well over 100,000 miles, but frequent short trips mean more starts and more wear.
Can I drive with a bad starter?
If it starts, it'll run. The risk is not being able to start it again. Park where a mechanic can reach you.
Can a mobile mechanic replace a starter?
Yes, on most vehicles. It's a standard mobile job.
Get it fixed where it's parked
Find a mobile mechanic near you on the locations page.
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