This part basically keeps the right amount of tension on your serpentine belt – that’s the belt that runs a lot of your accessories like your power steering pump, alternator, and air conditioning compressor. It has a spring – loaded arm and a pulley, and it automatically adjusts to keep the belt from slipping or getting too tight. Sometimes it also has a damper inside to help absorb vibrations and reduce noise. Think of it like this – the belt is what powers those accessories, and the tensioner is what makes sure the belt stays connected and working smoothly. Without it, the belt will flap around and won’t turn those parts properly. It’s a critical piece in keeping everything running as it should. If the tensioner goes bad, you'll likely notice pretty quickly. You’ll probably hear a whining or squealing noise, especially when you turn the steering wheel or when your engine is under load. A failing tensioner can also cause the belt to wear out faster, or even break, which could leave you stranded. It can even damage other components if the belt fails. It acts like a shield, preventing those bigger problems. You’ll notice if it’s starting to fail—usually through noise or if your battery light comes on because the alternator isn’t charging right. A lot of people find what they need at places like Fixparts Online, but any good auto parts store should have one for your vehicle. It's definitely a part you want to keep an eye on and replace when it starts to show wear. Advanced engineering: Belt Tensioner (MPN 21479276) comes with a 12-month warranty!

About Volvo Trucks

Volvo Trucks is a global leader in commercial vehicles, known for its fuel-efficient, safe, and durable trucks.

Why Choose Volvo Trucks?

• Get parts built to the exact standards of your Volvo truck, so they fit right and work like they should. • Keep your truck running its best for longer with parts designed for performance and durability. • Reduce downtime with parts that are readily available and backed by Volvo Trucks support. • Protect your investment and maintain your truck’s resale value with genuine Volvo parts. Drive with confidence – choose Volvo Trucks parts at FixParts Online.