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Genuine BMW Belts, Pulleys & Brackets

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Tensioner Pulley

BMW 11-28-1-742-858

Water pump & alt. 4.0 & 4.4L, alternator belt, adjust. For Serpentine Belt. 540i 1998-03, adjuster, alt & p/s belt. 740iL.

Backordered

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Accessory Drive Belt Tensioner Pulley

BMW 11-28-1-704-500

For Alternator Belt. 4.0 & 4.4L, alternator belt, idler. For Serpentine Belt. 540i 1997, idler.

Backordered

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Idler Pulley

BMW 11-28-7-557-851

3 series. Without diesel. Lower. 535i, 535xi. 135i. With turbo, 2008-10. Sedan & wagon, without 335d, M3, with turbo, #2. 3.0L, with...

$59.63

MSRP $82.24

Save $22.61

27.5% Off

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Idler Pulley

BMW 11-28-7-556-251

Z4. 3 series. Without diesel. Upper. 535i, 535xi. 135i. With turbo, 2008-10. Sedan & wagon, without 335d, M3, with turbo, #1. 3.0L, with...

$59.63

MSRP $82.24

Save $22.61

27.5% Off

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Idler Pulley

BMW 11-28-7-549-557

750i, 750Li. 650i. 745i, 745Li. 550i. X5. 4.8l. 645Ci. For Serpentine Belt. 4.4L.

$57.84

MSRP $72.30

Save $14.46

20% Off

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Belt Molding Bracket

BMW 51-35-7-252-800

Backordered

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Belt Tensioner

BMW 11-28-7-841-527

M series. Ac compressor. 4.0L, ac belt.

$196.20

MSRP $286.67

Save $90.47

31.6% Off

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Serpentine Idler Pulley

BMW 11-28-7-542-887

3.0L gas non turbo, mechanical tensioner, ac belt. X5. 3.0l. Without diesel. With 4-zone.

$59.63

MSRP $82.24

Save $22.61

27.5% Off

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Serpentine Idler Pulley

BMW 11-28-7-841-228

$85.13

MSRP $123.34

Save $38.21

31% Off

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Tension Pulley Cap

BMW 12-31-1-713-143

3.2L, water pump & alternator. 3.2L, drive belt. 2004-06, center. 525i,528i & 530i 1999-03, hydraulic tensioner, center. 2.5 & 3.0L...

$1.21

MSRP $1.35

Save $0.14

10.4% Off

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Tensioner Pulley

BMW 11-28-7-515-867

4.4, 4.6 & 4.8L, 2000-03, adjuster, ac belt. X5. Ac belt. 4.4l. Ac belt. 4.6l.

$115.43

MSRP $167.24

Save $51.81

31% Off

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Tensioner Pulley

BMW 11-28-7-515-865

4.0 & 4.4L, alternator belt, adjust. 4.4, 4.6 & 4.8L, 2000-03, adjuster, alt, water pump. 540i 1998-03, adjuster, alt & p/s belt. X5....

$181.18

MSRP $229.16

Save $47.98

20.9% Off

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Why Belts, Pulleys, and Brackets Are Important

The belt, pulley, and bracket system ensures power is delivered from the engine to essential accessories like the alternator and water pump. A failing component can lead to misalignment, noise, or complete loss of accessory function.

Problems That Oftern Occur with Belts, Pulleys, and Brackets

On a vehicle like the BMW X3, worn pulleys or loose brackets may cause belt slippage, reduced performance, or overheating. To help with maintenance, get to know the following belts and pulleys under the hood of your BMW.

Main Belts and Pulleys in Your Car

Drive belts that transfer rotational energy.
Idler pulleys that guide and maintain belt tension.
Tensioner pulleys that keep belts properly aligned.
Mounting brackets securing pulleys in place.
Accessory pulleys for alternators and pumps.

Best Practices When Replacing Belts, Pulleys, & Brackets

Disconnect the battery for safety.
Relieve tension on the belt and remove it.
Unbolt the worn pulley or bracket.
Install the replacement part securely.
Reinstall the belt and check alignment.

Other Parts to Consider Replacing

Replacing fenders during engine bay restoration enhances both function and appearance. Once you're done with underhood work, consider upgrading the look of your front fascia for both style and safety.

To find the best BMW parts, choose Bimmer OEM Parts. Shop here for exclusive discounts on OEM belts, pulleys, and brackets. For help with your order, contact us today.