What does a belt tensioner do?

A belt tensioner's job is to keep the accessory drive belt (also known as a serpentine belt) at the correct tightness. This ensures that all the components driven by the belt, like the alternator and A/C compressor, spin properly.

What are the signs of a failing belt tensioner?

Common signs include a chirping or squealing noise from the belt area, especially on startup or when accessories are engaged. You might also notice the belt looking loose or worn unevenly, or in severe cases, the belt could come off the pulleys.

Does this tensioner come with a new belt?

This part is for the belt tensioner assembly only. It does not include the serpentine belt itself. It's recommended to inspect your belt for wear and tear and replace it if necessary when installing the new tensioner.

Gates Serpentine Belt Tensioner 38384

Name: Gates 03-06 BMW X5 6-Cyl. 3.0L A.C. Belt Drive Tensioner
Brand: Gates
SKU: gates-gates-03-06-bmw-x5-6-cyl-3-0l-a-c-belt-drive-tensioner-t14-882374
Price: 179.48 USD
Availability: BackOrder

Gates 03-06 BMW X5 6-Cyl. 3.0L A.C. Belt Drive Tensioner

$179.48

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Gates 03-06 BMW X5 6-Cyl. 3.0L A.C. Belt Drive Tensioner

Key Features

Fits 2003-2006 BMW X5, 3 Series, 5 Series, X3, and Z4 models with a 3.0L 6-cylinder engine.
Maintains proper tension on the accessory drive belt for reliable operation of engine accessories.
Well-built spring mechanism ensures consistent tension over time.
Durable construction resists wear and vibration.
Helps prevent belt noise, slippage, and premature belt wear.
Designed as a direct replacement for the original equipment tensioner.

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Will it fit your car?

Product Details

When your BMW's accessory drive belt starts to make noise or you notice it's not tracking right, it's often the belt tensioner that needs attention. This tensioner from Gates is built to keep the proper tension on your serpentine belt, ensuring your alternator, power steering pump, and A/C compressor all run smoothly. It's designed for a range of BMW models, including the 2003-2006 X5, 3 Series (like the 325i and 330i), 5 Series (525i, 530i), X3, and Z4, all equipped with the 3.0L 6-cylinder engine.

Gates uses durable materials and a well-built spring mechanism to ensure this tensioner holds its position over time, even under the stress of engine vibrations and temperature changes. A failing tensioner can lead to a noisy belt, premature belt wear, or even cause the belt to slip off entirely, leaving you without essential accessories. This replacement part aims to restore the correct belt tension, preventing those issues and keeping your BMW's accessories functioning as they should.

Replacing a belt tensioner is a common service item for these BMWs. Make sure to inspect your serpentine belt at the same time, as it's easily accessible once the tensioner is removed. This tensioner is designed to fit right into the factory location, making the replacement process straightforward for a mechanic.