How To Change The Alternator

If you’re having trouble with your car’s electrical system, one potential culprit could be a faulty alternator. In this article, we’ll walk you through the steps on how to change the alternator.

Gather Your Tools

Before you get started, make sure you have all the necessary tools on hand. You’ll need a socket set, pliers, a wrench, and a new alternator.

Step 1: Disconnect the Battery

Before you do anything else, disconnect the battery to prevent any electrical shocks. Locate the negative terminal on the battery and use a wrench to loosen the bolt. Then, carefully remove the cable from the terminal.

Step 2: Locate the Alternator

The alternator is typically located near the front of the engine. Look for a cylindrical-shaped component with wires attached to it.

Step 3: Remove the Alternator Belt

Using a socket set and a wrench, loosen the bolts on the alternator bracket. Then, slide the alternator towards the engine to loosen the belt. Remove the belt from the alternator pulley.

Step 4: Disconnect the Wires

Using pliers, carefully remove the wires from the alternator. Make sure you remember where each wire goes so you can reconnect them later.

Step 5: Remove the Alternator

Using a socket set, remove the bolts that hold the alternator in place. Carefully remove the alternator from the engine.

Step 6: Install the New Alternator

Position the new alternator in place and secure it with the bolts. Reconnect the wires to the alternator, making sure to attach each wire to the correct terminal.

Step 7: Reinstall the Alternator Belt

Slide the alternator away from the engine to tighten the belt. Then, tighten the bolts on the alternator bracket to secure it in place.

Step 8: Reconnect the Battery

Finally, reconnect the battery by attaching the cable to the negative terminal and tightening the bolt.


Q: How long does it take to change an alternator?

A: The time it takes to change an alternator can vary depending on the make and model of your car. However, it typically takes between one and two hours.

Q: Can I change the alternator myself?

A: Yes, you can change the alternator yourself if you have the necessary tools and knowledge. However, if you’re not comfortable working on your car, it’s best to leave it to a professional.

Q: How much does it cost to replace an alternator?

A: The cost of replacing an alternator can vary depending on the make and model of your car. On average, you can expect to pay between $300 and $500.


Changing the alternator in your car might seem intimidating, but it’s a relatively straightforward process. With the right tools and a little bit of know-how, you can replace the alternator and get your car running smoothly again. Just remember to always disconnect the battery before starting any electrical work.