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. One size fits all: Belt Tensioner (MPN SAU15962) has a 12-month warranty!

About John Deere

John Deere is a global leader in agricultural and construction equipment, renowned for its durable and high-performing machinery.

Why Choose John Deere?

• Get parts built to the exact standards of your John Deere equipment, so they fit right and work like they should. • Keep your machine running at peak performance with parts designed specifically for its engine and system. • Avoid downtime and costly repairs by using reliable parts that last. • Protect your investment – genuine John Deere parts help maintain your machine's value. John Deere delivers excellence, FixParts Online delivers to your door.