What Is a Serpentine (Drive) Belt?
One belt drives most of your engine’s accessories — and it’s cheap insurance. A Cranbourne West specialist explains.
What it is & what it does
The serpentine (drive) belt is a single belt that winds around several pulleys to drive the alternator, water pump (on some engines), power-steering pump, and air-con compressor off the engine. It’s tensioned by an automatic tensioner.
It’s separate from the timing belt — the drive belt runs the accessories, the timing belt runs the engine’s valves.
Signs of trouble & how we help
A worn belt squeals (especially cold or on start-up) and a failed tensioner rattles. If the belt snaps you lose charging and, on some engines, the water pump — leaving you stranded or overheating. It’s a cheap, high-value replacement.
We inspect the belt, tensioner and pulleys at every service and replace them before they fail.
Questions about your car? Just ask.
Understanding what’s under the bonnet makes servicing decisions easier — and we’re always happy to explain what your car needs and why, in plain English.
Book a service or a check with a Cranbourne West specialist online in 60 seconds, or call 03 8782 0711.
What Is a Serpentine (Drive) Belt? — FAQ
It drives the alternator, power-steering and air-con (and water pump on some engines) off the engine.
No — the drive belt runs the accessories; the timing belt runs the engine’s valves.
You lose charging and, on some engines, the water pump — stranding you or causing overheating.
A squeal (cold/start-up) or a rattle from the tensioner. See our belt-noise guide.
Related guides & services
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