Melanie Reiff
Updated on Nov 16, 2022
Most alternator pulley issues are caused by the pulley bearings wearing out or failing. A mechanic can check the bearings to ensure they’re functioning properly and replace them and the pulley itself if they show signs of significant wear.
Your alternator can’t generate electricity if the pulley isn’t functioning properly. That’s why car insurance brokerage app Jerry put together this guide on everything you need to know about your alternator pulley and what to do if you have issues with it.
The exact cost varies between different Best models. For example, newer vehicle models are usually made with more expensive materials, so recent or high-end models will cost more, especially if your service requires a part replacement. Use the table below to estimate the cost for your own vehicle.
CarTotal Cost EstimateParts CostLabor CostAverage Dealer PriceEstimated Service Duration

What is an alternator pulley replacement?

Normally, your alternator pulley itself doesn’t need regular maintenance. The pulley bearings, however, will break down over time. If you start having issues with your alternator, a mechanic can check the pulley and bearings and replace anything that’s damaged or worn out.
Your alternator supplies all the electricity needed for your vehicle to operate. It generates an electric field when the drive belt spins magnets inside of coils. The alternator pulley powers the drive belt that makes the whole alternator function.

How to replace an alternator pulley

To replace your alternator pulley, a mechanic will generally follow these steps:
  • Remove the negative battery cable
  • Remove alternator belt
  • Remove pulley bolts and pulley
  • Install new alternator pulley
  • Tighten alternator belt

When do I need to replace my alternator pulley?

If your vehicle starts having electrical issues, you might need to have your alternator pulley replaced.
Typically, alternator pulley issues result from normal wear and tear to the pulley bearings. A mechanic can spot worn bearings during routine maintenance and replace them before they fail.
However, the alternator pulley itself can be damaged as a result of a car accident or the alternator belt slipping off the pulley.
If you start having any of the following issues with your vehicle, have a mechanic check the alternator pulley and bearings:
  • Dim or overly bright interior and exterior lights
  • Dead battery or battery that won’t charge properly
  • Slow or malfunctioning accessories
  • Car won’t start or frequently stalls
  • Whining sounds under the hood
  • Burning rubber smell
  • Battery warning light comes on

How to find cheap car insurance

Maintaining your vehicle regularly can save you a lot of money on costly repairs. Jerry can save you a lot of money on car insurance by comparing rates and policies.
Jerry compares quotes from top companies in as little as one minute, helping you find a policy that fits your needs and budget. And when you find the right policy for you, Jerry will even handle all the paperwork to switch your policy and cancel your old one. And when it comes time to renew your insurance, Jerry will automatically run another comparison to make sure you’re still getting the best rates.
Keep in mind that your location is another factor that determines the final cost of repairs. Areas with higher cost of living will usually have more expensive car repair services, especially if there’s less local competition. Check out the table below for an estimate of what Best drivers pay in different cities.
CityCarTotal Cost EstimateParts CostLabor CostAverage Dealer PriceEstimated Service Duration
Jerry doesn’t just offer fair price repair estimates for Best drivers! Our team of writers has collected everything you need to know for every car. Here’s how much the repair costs for some popular cars:
CarTotal Cost EstimateParts CostLabor CostAverage Dealer PriceEstimated Service Duration
The cost of repairs might vary depending on which Best you drive, but there’s an easy way to save money for the services you need! Just download the Jerry app for help lowering your insurance premiums. In less than 45 seconds, Jerry collects all of your information from your existing insurer. Choose from competitive quotes from top insurance companies and Jerry takes care of the rest—securing your new policy and helping you cancel your old one upon request.
With an average annual savings of $887, Jerry can help you free up funds for the repairs your Best’s needs.
The content contained in this article is for informational purposes only and should not be used in lieu of seeking professional advice. We encourage you to consult with a certified technician or mechanic if you have specific questions or concerns relating to any of the topics covered herein. Under no circumstances will we be liable for any loss or damage caused by your reliance on any content.