Basically, this little guy keeps your belts tight. Think of it as a spring – loaded arm that constantly presses against the belt, making sure it doesn’t flap around or get loose. It’s got a pulley itself, which the belt runs around, and an internal mechanism – often a hydraulic one, or sometimes spring – loaded – that maintains consistent tension. Some have a little bit of “give” built in, so they can absorb vibrations and prevent the belt from getting stressed too much. You’ll find these on most engines that use belts to drive things like the alternator, power steering pump, air conditioning compressor, and sometimes even the water pump. It’s part of the accessory drive system. The engine spins a crankshaft, and that power gets transferred to those accessories through a series of pulleys and belts. The tensioner pulley acts like a shield, protecting the belt and other components from wear and tear. It ensures the belt stays properly aligned and doesn’t slip, which is critical for those accessories to work correctly. A failing tensioner pulley can cause all sorts of problems. If the tension isn't right, the belt can slip, which means those accessories aren't getting the power they need. You’ll notice if your battery light comes on – that’s often the alternator being affected. Or your power steering might feel heavy. Worse, a really bad tensioner can cause the belt to break completely, leaving you stranded. It’s a relatively inexpensive part to replace compared to the damage a broken belt can cause. You can find a good selection of them over at Fixparts Online, and it’s usually a straightforward repair for a mechanic. It’s one of those things that’s best to address before it becomes a big issue. Buy risk-free: Tensioner Pulley (MPN 171512) is covered by a 3 year manufacturer guarantee!

About Febi

Ferdinand Bilstein is well known for reliability and is trusted by repair professionals worldwide.

Why Choose Febi?

• Febi parts are made to the same standards as original equipment, so you know they'll fit and work well. • We offer a really wide range of parts – everything from engine components to wear and tear items – so you can find almost anything you need in one place. • Febi has been around for over 75 years, so we have a lot of experience and a reputation for quality. • Our prices are competitive, giving you great value for reliable parts. Febi delivers excellence, FixParts Online delivers to your door.