This belt’s job is to transfer power from the crankshaft – that’s where the engine makes its rotation – to various accessories. Things like your alternator (which charges the battery), your power steering pump, the AC compressor, and sometimes even the water pump. It’s a single, serpentine belt that snakes its way around all those components, driving them as the engine runs. It’s not like the old V – belts that were individual belts for each accessory; this one does it all. Think of it as the engine’s lifeline to all those vital systems. It’s directly responsible for keeping everything running that isn’t directly related to making the engine go. Without it, your battery will die, you won't have power steering, your AC won't work, and, in some cases, your engine could overheat. It's a pretty critical piece. It wraps around pulleys on each of those accessories and transfers that rotational force. Honestly, you’ll notice if this belt goes bad pretty quickly. You might hear a squealing sound, especially when you first start the car or when you turn on the AC. That’s a sign it’s slipping. Or, one of those accessories just stops working – no power steering, no AC, a warning light on your dash because the battery isn't charging. A worn or broken belt can lead to a lot of headaches. It acts like a shield, protecting those components from failing because of a lack of power. Replacing it is relatively inexpensive, and definitely cheaper than dealing with a failed alternator or overheating engine. You can find a good quality one at places like Fixparts Online, and it’s something most DIYers can tackle, though if you’re not comfortable, it's always best to have a mechanic do it. Drive with confidence: Poly V Belt (MPN 12317681841) is backed by a 12-month warranty!

About BMW

BMW is a premium German automobile manufacturer renowned for its innovative technology, luxurious designs, and dynamic driving performance.

Why Choose BMW?

• Get parts made specifically for your BMW, so they fit and work perfectly. • BMW parts are known for their high quality and durability, meaning they last longer. • Using genuine BMW parts helps maintain your vehicle’s value. • You can trust BMW parts to keep your car running smoothly and safely. Drive with confidence – choose BMW parts at FixParts Online.