The serpentine belt gets its name because it snakes around several components of your engine – including the alternator, air conditioner, power steering and water pump – and powers them as the crankshaft turns. When this belt fails, all the associated components – the alternator, air conditioner, power steering and water pump – stop working. That’s why it’s in your best interest to replace a serpentine belt before it breaks.
We recommend that you regularly check your serpentine belt for signs of wear, such as every time you have your oil changed. If you see any cracks or fraying, it’s best to replace the belt before it breaks. Listen for signs of wear, too. A squealing belt may need to be replaced.
TJ’s recommends that you plan to replace your vehicle’s serpentine belt as preventive maintenance every 60,000 to 80,000 miles. If you notice that the belt is cracked or frayed, replace it right away.
Refer to your vehicle’s owner manual for recommended service intervals about the manufacturer’s recommendations for your vehicle.