Last Updated: Feb 05, 2020

PDR Automotive Inc. Auto Tips and Car Care: Serpentine Belt Overview

Your serpentine belt drives important engine accessories like your alternator, air conditioning compressor, and power steering. In some cars it may also power the power brakes or water pump. The serpentine belt is powered by the engine and winds around pulleys and the accessories. Some cars have two serpentine belts.


The serpentine belt, the belt tensioner (which maintains the appropriate tension on the belt) and the idler pulleys are together known as the accessory drive system.

Now your serpentine belt and the belt tensioner will just wear out over time – that’s why your car maker has a scheduled belt replacement interval. The team at PDR Automotive Inc. in Urbana can survey your serpentine belt for wear and get it replaced if it’s time.

Give us a call

PDR Automotive Inc.
217-367-9481
1008 N. Cunningham Avenue
Urbana, Illinois 61802