A starter replacement takes two to four hours and costs $300 to $1,000 in parts and labor

A starter is an electric motor that cranks your engine to life when you turn the key. When it fails, your engine won't turn over at all — you'll hear a clicking sound, a grinding noise, or nothing. Replacing one is a job most homeowners with basic tools can do in a driveway, though some cars make it harder than others because the starter sits in a tight spot under the engine.

The cost depends on your vehicle. A starter motor itself runs $150 to $400 new, or $50 to $150 used. Labor at a shop adds another $150 to $600. If you do it yourself, you save the labor but need a socket set, wrenches, a jack, jack stands, and a few hours of time. The hardest part is usually access — on some cars you remove the wheel and inner fender; on others you work from underneath.

Key Takeaways

  • Before you remove anything, confirm the starter is actually dead by checking the battery terminals are clean and tight, and testing the battery voltage with a multimeter.
  • Disconnect the negative battery terminal first, then unbolt the starter from the engine block and disconnect the wires — the order matters for safety.
  • The starter bolts to the engine in two or three places; write down which wire goes where before you disconnect anything, because the terminals look similar.
  • A replacement starter must match your engine size and year — bringing your old one to the parts store or looking up your VIN ensures you get the right fit.
  • If the new starter clicks but doesn't crank, the battery may be too weak; if it spins but the engine doesn't turn, the starter gear may not be engaging the flywheel.

Confirm the starter is actually the problem

Before you buy a new starter, rule out a dead or weak battery. A battery that won't hold a charge will make your engine sound like it's trying to turn over but can't — similar to a bad starter. Turn on the headlights; if they're dim or off, the battery is likely the culprit. If the lights are bright but the engine won't crank, the starter is probably bad.

Check the battery terminals next. Corrosion on the posts — a white, blue, or green crusty buildup — blocks current flow. Disconnect the negative cable, scrub both terminals with a wire brush, reconnect, and try starting again. If the engine still won't turn over and the lights are bright, the starter is likely dead.

If you have a multimeter, test the battery voltage with the key off. A healthy battery reads 12.6 volts or higher. Anything below 12 volts means the battery needs charging or replacement. If the battery tests good and the terminals are clean, the starter is almost certainly the problem.

Locate the starter and gather your tools

The starter sits on the engine block, usually near the bottom where the engine meets the transmission. On front-wheel-drive cars, it's often tucked behind the engine on the transmission side. On rear-wheel-drive vehicles, it's usually on the driver's side of the engine. Consult your owner's manual or a repair guide for your specific model — some starters are easy to reach from the top, while others require removing a wheel or working from underneath.

You'll need a socket set (usually 10mm, 13mm, and 15mm sockets), wrenches, a jack, jack stands, and a wire brush. Have a camera or notebook ready to photograph or sketch the wire connections before you disconnect them. Wear safety glasses and work gloves. If you're working underneath the car, never rely on a jack alone — always use jack stands rated for your vehicle's weight.

Disconnect the battery and remove the old starter

Disconnect the negative battery terminal first — this is critical for safety. Loosen the nut on the negative post with a wrench, slide the cable off, and set it aside where it can't touch metal. This prevents electrical shock and short circuits while you work.

Locate the two or three bolts holding the starter to the engine block. These are usually 13mm or 15mm. Remove them and set them aside in a safe place — you'll reuse them. Gently pull the starter away from the engine. It may be stuck; tap it lightly with a rubber mallet if needed, but don't force it.

Once the starter is loose, you'll see two or three wires connected to it. One is a thick cable from the battery (the main power wire), one is a thin wire from the ignition switch (the control wire), and some starters have a ground wire. Before you disconnect anything, take a photo or write down which wire goes where. The terminals look similar, and mixing them up will prevent the new starter from working. Disconnect the wires by unbolting or unclipping them, then remove the starter completely.

Install the new starter

Before you install the new starter, compare it to the old one. They should look identical — same size, same bolt pattern, same wire terminals. If they don't match, you have the wrong part; return it and get the correct one for your vehicle's year, make, model, and engine size.

Position the new starter against the engine block and thread the bolts by hand first — this prevents cross-threading. Once all bolts are hand-tight, use your socket wrench to tighten them in a crisscross pattern (like tightening a wheel), alternating between bolts so pressure is even. Tighten firmly but don't over-torque; you're aiming for snug, not crushing.

Reconnect the wires in reverse order of how you removed them. The thick battery cable goes on first, then the thin ignition wire, then the ground wire if there is one. Tighten each terminal nut firmly with a wrench — a loose connection will prevent the starter from working or cause arcing.

Reconnect the battery and test

Reconnect the negative battery terminal by sliding the cable onto the post and tightening the nut with a wrench. Make sure it's snug; a loose connection will cause starting problems. Close the hood or fender, get in the car, and turn the key to the start position. The engine should crank and start normally. If it does, you're done.

If the starter clicks but doesn't crank, the battery may be too weak to turn the engine over. Charge the battery fully and try again. If the starter spins but the engine doesn't turn, the starter gear may not be engaging the flywheel — this usually means the starter is installed slightly out of position. Remove it, check that the bolt holes line up perfectly, and reinstall it.

If the starter doesn't respond at all, double-check that the wires are tight and connected to the correct terminals. A loose or reversed wire is the most common reason a new starter doesn't work immediately after installation.

When to call a mechanic instead

If your car's starter is buried deep in the engine bay — some Subarus, Audis, and luxury vehicles require removing the intake manifold or transmission mount — the job becomes a full day of work. A shop can do it faster and has the right tools. If you don't have a jack and jack stands, or if you're not comfortable working under a raised vehicle, a mechanic is the safer choice.

If the new starter still doesn't work after you've checked the connections, the problem may not be the starter at all — it could be a bad ignition switch, a corroded ground wire, or a wiring fault. A mechanic with a multimeter can diagnose this in minutes, whereas troubleshooting it yourself takes trial and error.

Frequently Asked Questions

Can I drive the car if the starter is bad?

No. A bad starter won't crank the engine, so the car won't start. You can't drive it at all. If the engine is already running, you can drive it, but once you turn it off, you won't be able to restart it without a new starter or a jump-start from another vehicle.

How do I know if it's the starter or the alternator?

A bad starter prevents the engine from cranking at all. A bad alternator lets the engine start but the battery drains while driving, and the battery light stays on. If your engine won't turn over and the battery is good, it's the starter. If the engine starts but dies after a few minutes, it's likely the alternator.

What's the difference between a new and rebuilt starter?

A new starter is factory-made and comes with a full warranty. A rebuilt starter is a used one that's been disassembled, cleaned, and reassembled with new brushes and bearings. Rebuilt starters cost less but may have a shorter warranty. Both work well if they come from a reputable supplier.

Do I need to reprogram the new starter?

No. A starter is a simple electric motor with no computer programming. Once it's bolted in and wired correctly, it works. Some cars have security systems that may prevent starting if the ignition switch is faulty, but the starter itself doesn't need programming.

Why does my new starter make a grinding noise?

Grinding usually means the starter gear isn't fully disengaging from the engine's flywheel after the engine starts. This happens if the starter is installed slightly out of position or if the solenoid isn't releasing properly. Remove the starter, check the bolt holes for alignment, and reinstall it. If grinding continues, the starter may be defective and need replacement under warranty.