This thing basically keeps the right amount of tension on your serpentine belt. That belt drives a lot of important stuff—your alternator, power steering pump, air conditioning compressor, sometimes even the water pump. The tensioner has a spring – loaded arm and a pulley. The arm pushes against the belt, keeping it tight. The pulley itself helps guide the belt along its route. It’s designed to automatically adjust for wear on the belt and keep everything running smoothly. Think of it as a key component in the whole front engine accessory drive system. Without it, the belt would flap around and not properly turn those accessories. It’s positioned so it applies consistent force, making sure everything gets powered as it should. It’s generally pretty close to the front of the engine, usually on the driver’s side, but it can vary. A failing tensioner can cause a whole lot of trouble. If it goes bad, the belt can slip or even break. You’ll notice if that happens – you might hear a squealing sound, especially when you first start the car or when you put a load on the engine like turning on the AC. If the belt breaks, you could lose power steering, your battery won’t charge, and your engine could overheat. It acts like a shield against those issues. Replacing it is a lot cheaper and easier than dealing with the consequences of a broken belt or a damaged engine. You can often find a good replacement pretty easily, even on places like Fixparts Online, and it's something a reasonably handy person can tackle as a DIY job. Buy risk-free: Serpentine Belt Tensioner (MPN 21707) is covered by a 3 year manufacturer guarantee!

About Febi

Ferdinand Bilstein is a leading global supplier of aftermarket spare parts, offering an extensive range of high-quality components for passenger and commercial vehicles.

Why Choose Febi?

• Febi parts are made to the same standards as original equipment, so you get reliable quality. • We offer a huge range of parts – from engine components to wear-and-tear items – covering many vehicle makes and models. • Febi has been a trusted name in the automotive industry for over 70 years, so you’re choosing a brand with a long history of performance. • You get a great balance of quality and price, meaning you don’t have to break the bank to keep your vehicle running smoothly. FixParts Online – Your Trusted Source for Quality Febi Auto Parts.