What happens when you replace a starter
A starter is the electric motor that turns your engine over when you turn the key or press the ignition button. When it fails, your engine won't crank — you'll hear a clicking sound, a grinding noise, or nothing at all. Replacing it means removing the old starter motor from under your car and bolting a new one in its place.
The job takes two to four hours for most vehicles if you have basic mechanical skills and the right tools. You'll need to disconnect the battery, locate the starter (usually underneath the engine or on the side), unbolt it, disconnect the wiring, and install the replacement. The hardest part is usually access — on some cars, you have to remove other components first to reach the starter.
You can buy a replacement starter new, remanufactured, or used. New starters cost $200 to $500 depending on your vehicle. Remanufactured ones run $150 to $350 and come with a warranty. Used starters from a salvage yard might be $75 to $200 but carry no may provide. A shop will charge $400 to $1,200 in labor on top of the part cost.
Key Takeaways
- Disconnect the negative battery terminal before you touch anything electrical to avoid shock or short circuits.
- The starter is bolted to the engine block or transmission housing, usually accessible from underneath or from the side depending on your car's layout.
- You will need to disconnect two or three wires and bolts before the starter comes free — take a photo before you disconnect anything so you remember where each wire goes.
- The replacement starter bolts in the same way the old one came out, and the whole job can be done in a driveway with basic hand tools if you have good access.
Tools and parts you'll need
Gather these items before you start. You'll need a socket set (usually 8mm to 15mm sockets), a wrench set, a screwdriver set, and a battery terminal puller or adjustable wrench to disconnect the battery. A jack and jack stands are essential if you need to get under the car — never work under a vehicle supported only by a jack.
You'll also want a flashlight or headlamp, since the starter is often in a dark spot. A wire labeler or masking tape and a marker help you remember which wire goes where. Have a small container or magnetic tray to hold bolts so you don't lose them. A new starter (new, remanufactured, or used) is the main part — check your vehicle's year, make, model, and engine size when you order it, because the wrong starter won't fit.
Some vehicles require removing the air intake, battery tray, or other components to reach the starter. Check your car's service manual or search online for "[your vehicle] starter replacement" to see if special steps explore to your model. This takes five minutes and can save you an hour of frustration.
Disconnect the battery before you start
Turn off the engine and let it cool. Open the hood and locate the battery — it's usually a black rectangular box with two thick cables attached. The negative terminal is marked with a minus sign (−) and is usually black. The positive terminal is marked with a plus sign (+) and is usually red.
Using a wrench or battery terminal puller, loosen the nut on the negative terminal and slide the cable off. Do not touch the positive terminal. Tuck the negative cable away from the battery so it cannot accidentally touch the terminal again. This step prevents electrical shock and stops you from accidentally shorting the battery while you work.
Locate and access the starter
The starter is bolted to the engine block or transmission housing, usually on the lower side or underneath. On front-wheel-drive cars, it's often on the passenger side near the bottom of the engine. On rear-wheel-drive cars, it's frequently underneath toward the back of the engine. Check your service manual or a video for your specific vehicle to know exactly where to look.
You may need to raise the car on a jack and find it with jack stands to get underneath. If the starter is accessible from above or the side without lifting, you can work from there. Remove any heat shields, brackets, or other parts blocking access — these are usually held by one or two bolts and slide or unbolt easily.
Once you can see the starter, you'll notice two or three bolts holding it to the engine or transmission, and two or three wires connected to it. Take a photo of the wires and their positions before you disconnect anything. This photo is your insurance against mixing up the connections when you install the new starter.
Remove the old starter
Disconnect the wires from the starter terminals. Usually there is a large wire (the main power cable) and one or two smaller wires. The large wire typically has a nut you loosen with a wrench. The smaller wires may have spade connectors that slide off, or they may be bolted on. Label each wire with tape and a marker so you know which one goes where on the new starter.
Unbolt the starter from the engine or transmission using your socket set. Most starters have two or three bolts — usually 14mm or 15mm. Keep these bolts in a safe place; you'll use them again. Once the bolts are out, the starter should slide free. It may be heavy and awkward, so support it as you pull it out.
Set the old starter aside. If you're returning it for a core charge (a refund for the old part), keep it clean and don't damage it further. If you're disposing of it, take it to a recycling center or auto parts store that accepts old starters.
Install the new starter
Position the new starter in the same location where the old one sat. Align the bolt holes and slide the starter into place. Insert the bolts and tighten them by hand first, then use your socket wrench to tighten them firmly — not so hard that you strip the threads, but snug enough that the starter won't move.
Reconnect the wires in the same order they were on the old starter. Use your photo as a guide. The large power cable usually goes to the largest terminal. Tighten the nuts or push the spade connectors on firmly. A loose wire connection is a common reason a new starter doesn't work, so double-check each one.
If your car has a heat shield or bracket you removed, reinstall it now. Make sure nothing is resting against the starter or its wires.
Reconnect the battery and test
Slide the negative battery cable back onto the negative terminal and tighten the nut with your wrench. Make sure it's snug — a loose battery connection can cause electrical problems throughout the car.
Close the hood and get into the driver's seat. Turn the key or press the ignition button. The engine should crank and start normally. If it cranks but doesn't start, check that your fuel pump is working and you have fuel. If it doesn't crank at all, turn off the ignition and check that all your wire connections are tight and in the right places.
Let the engine run for a minute to make sure the starter disengages cleanly and the engine runs smoothly. If you hear grinding or other unusual noises, turn off the engine when ready and check your connections. Once everything sounds normal, you're done.
Frequently Asked Questions
Can I replace a starter without removing the engine?
Yes — the starter is designed to be replaced without pulling the engine. On some vehicles you may need to remove the air intake, battery tray, or other small components to reach it, but the engine stays in place. Check your vehicle's manual or a video for your specific model to see what needs to come off first.
What if the new starter doesn't work?
First, turn off the ignition and check that all wire connections are tight and in the correct positions. Loose wires are the most common reason a new starter doesn't work. If the connections are tight, the starter may be defective — contact the seller or manufacturer about a replacement or refund. If you bought a used starter, it may have been faulty when you got it.
Do I need a new starter or can I rebuild the old one?
Rebuilding is possible but rarely worth the cost or time. A remanufactured starter from an auto parts store costs less than rebuilding and comes with a warranty. Rebuilding requires special equipment and informed that most home mechanics don't have. Buy a remanufactured part instead.
How long does a starter usually last?
Most starters last 100,000 to 150,000 miles, though some fail earlier and some last longer. Frequent short trips, cold weather, and a weak battery all put extra strain on the starter. Once it fails, replacement is the only fix.
Can I drive the car if the starter is bad?
No — if the starter won't turn the engine over, the engine won't start and you can't drive. You'll need to have the car towed or replaced before you can use it again. Don't ignore a clicking sound or grinding noise when you turn the key, as these are early signs the starter is failing.