The drive belt is crucial because it makes it possible for the engine to drive many attachments like the alternator and the A/C compressor.
Drive belt functionThe drive belt, also known as the serpentine belt is what keeps the engine running as smoothly as possible. Some vehicles use a dual belt system, but new automobiles have a single belt. In many vehicles, the drive belt wraps around the other attachments and joins them with the crankshaft pulley. The drive belt is capable of lasting up to 150,000 miles with no problem but at some point, it does need to be replaced.
Common problems with a faulty drive beltA faulty drive belt can lead to squealing, an overheating engine, and cracks on the belt.