BMW Belt Tensioner 11287799851 | Genuine BMW

Genuine BMW Mechanical Belt Tensioner 11287799851

The Genuine BMW Mechanical Belt Tensioner 11287799851 is an important component of the engine’s accessory belt drive system. BMW OE 11 28 7 799 851 is designed to maintain the correct tension on the serpentine/accessory belt, helping the belt operate smoothly around the alternator, air-conditioning and power-steering drive system.

A worn belt tensioner can allow excessive belt movement, create abnormal noises and contribute to premature accessory-belt wear. Replacing a faulty tensioner helps maintain proper belt tension and reliable accessory-drive operation.

BMW Part Details

Part Number: 11287799851
BMW OE Number: 11 28 7 799 851
Part Description: Mechanical Belt Tensioner
Also Known As: Serpentine Belt Tensioner, Accessory Belt Tensioner, Belt Tensioner Pulley
System: Engine / Accessory Drive
Brand: Genuine BMW

Compatible BMW Models

Part 11287799851 is listed for selected BMW diesel applications, including:

BMW X5 E70 – 3.0d
BMW X5 E70 – 3.0sd
BMW X5 E70 xDrive35d
Selected BMW X5 E70 LCI 35d
Selected BMW X6 E71 30dX
Selected BMW X6 F16 35dX

The part is associated with BMW M57/M57N2 3.0L diesel applications. Exact compatibility depends on the vehicle’s engine, production date and accessory-belt configuration.

What Does the BMW Belt Tensioner Do?

The belt tensioner applies and maintains the correct tension on the accessory drive belt. This helps prevent excessive belt slack and keeps the belt properly engaged with the accessory pulleys.

The accessory drive can operate important systems such as the alternator, air-conditioning compressor and power-steering system, depending on the BMW application.

Symptoms of a Worn BMW Belt Tensioner

A failing tensioner may cause:

Squealing or chirping from the engine bay
Belt vibration or excessive movement
Uneven serpentine-belt wear
Belt slipping or poor tracking
Rattling or pulley noise
Premature accessory belt failure
Loss of accessory drive function if the belt comes off

When replacing the tensioner, it is advisable to inspect the serpentine belt and deflection/idler pulleys at the same time.

Buy BMW Belt Tensioner 11287799851 in Nairobi

Looking for a BMW belt tensioner 11287799851 in Nairobi, Kenya?

Bavarian Trading Company supplies BMW spare parts and provides BMW servicing and repairs from our garage and parts shop at Adams Arcade, off Ngong Road, Nairobi.

We can assist with:

Genuine BMW belt tensioners
BMW serpentine belt replacement
Accessory drive inspection
BMW diagnostics
BMW diesel servicing
BMW spare-parts identification

Order BMW 11287799851 today. Send us your BMW VIN/chassis number before purchasing and we can help confirm whether this is the correct belt tensioner for your BMW.

Important Fitment Note

BMW uses different accessory-drive components across engines and production periods. Always verify 11287799851 against your VIN/chassis number before ordering, particularly when purchasing for an X5 or X6 diesel.