Description
The OEM Belt Tensioner (Part Number: 11288620022) is a genuine BMW accessory drive component designed to maintain proper tension on the serpentine (auxiliary) belt, ensuring smooth operation of engine accessories such as the alternator, power steering pump, and A/C compressor.
Manufactured to BMW factory specifications using high-strength materials and precision bearings, this automatic tensioner compensates for belt stretch and wear over time, reducing belt slippage, noise, and premature belt failure. A worn or faulty belt tensioner can cause squealing belts, accessory malfunction, or uneven belt wear. Replacing it with an OEM tensioner restores proper belt tension, smooth accessory operation, and drivetrain reliability.

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