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. More than just a part: Belt Tensioner (MPN 03-40073-SX) includes a 12-month warranty!

About Stellox

Stellox offers a diverse selection of spare parts including suspension components, brake systems, filters, and engine parts.

Why Choose Stellox?

• Stellox parts are built to last, using high-quality materials so you don’t have to replace them often. • We offer a wide range of parts for many different car makes and models, meaning we likely have what you need. • Stellox parts are a smart choice for your budget – they deliver excellent performance without the high price tag of dealer parts. • We stand behind our products with a warranty, giving you peace of mind knowing you’re covered. Performance you can rely on – Stellox parts from FixParts Online.