BMW Drive Belts & V-Belts for BMW Z4 M Roadster S54 (2003-2008)

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Your BMW's drive belts are wear items, and will degrade and crack over time. Don't wait until you have a belt failure... don't get stranded! Replacing your BMW's belts, such as the alternator belt, power steering belt, air conditioning AC belt, or serpentine belt is a low cost insurance policy to preventing a break down -- or worse, engine damage. We recommend checking your belts every 10,000 miles. If your belts have excessive cracks, dry rot, missing teeth and/or grooves, are cause noise, it's time for new ones.

While also inspecting your serpentine belts, also check for wear or resistance in the pulleys. The tensioner pulley and deflection pulley are the primary sources for belt squealing. The rubber-isolated pulleys can also break apart, leading to total belt failure. We sell the tensioner and deflection pulleys for the M50 engine family used in the E34, E36, E39, E46, X5, Z3, and Z4.

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Febi - Corporate Logo
T#:363804
Part#: 11287838797
Ships on Dec 2, 2026
$ 83.99 USD
Free Shipping
$ 83.99 USD
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The Hydraulic Alternator Belt Tensioner is exposed to a lot of dirt, salt, and other debris due to its front lower location. This can cause the tensioner to seize and not allow the belt tensioner to adjust. Replace your belt tensioner with this OEM high quality hydraulic tensioner for many years of reliable operation to come.
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OEM Febi Idler Pulley - Multiple BMWs
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:382342
Part#: 11287841228
In Stock
$ 48.99 USD
Free Shipping on orders $49 and up
$ 48.99 USD
Free Shipping on orders $49 and up
This is an OEM Febi Upper Idler Pulley, also known as the roller pulley or deflection pulley. The upper and lower idler pulleys are known to be the primary sources for 'belt squealing'. The pulley is also encased in rubber which will crack over time. If left without service the rubber could fail completely, chucking the belt and leaving you stranded. Replacement is a very simple procedure and can be done anytime the fan is off the engine (belt replacement, water pump service, alternator replacement, etc).
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Rogue Engineering - Corporate Logo
T#:553971
Part#: PP.S54
In Stock
$ 259.00 USD
Free Shipping
$ 259.00 USD
Free Shipping

Rogue Engineering has developed a power pulley kit that reduces the drag on specific pulleys while allowing others to remain at their same efficiency. This allows for perfect operation in daily driven vehicles without a hiccup or stutter. However, when the demand for power is requested, the power pulley kit allows for the freed power to become apparent.  The term "power" pulley is a bit of a misnomer. Underdrive pulleys actually free up power by reducing the drag caused by the accessories.  These pulleys are based off a calculated percentage from factory dimensions, so that particular component speeds are safely reduced without affecting their true purpose.

Rogue Engineering Power Pullies are CNC machined from 6061-T6, heat treated aluminum and specially coated with a MIL-A-8625 Type III hard coat anodize finish. This kind of anodizing is not to be confused with a Type II cosmetic anodize finish (typical colors such as red, blue, silver, green, etc.). The hard coat anodize finish actually builds a small surface layer on top of the aluminum, preventing wear.

This part fits the following BMW engines:
S54

This part fits the following chassis:
E46, Z3, Z4

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Bav Auto Ratcheting Serpentine Belt Wrench Kit
10X Entries Into Our F80 M3 Sweepstakes
Bav Auto Tools - Corporate Logo
T#:580390
Part#: B8800077
In Stock
Sale - Save 10% $ 67.99

This product was last offered at the strikethrough price on
05-03-2026

$ 61.19 USD
Free Shipping on orders $49 and up
Sale - Save 10%
$ 67.99

This product was last offered at the strikethrough price on
05-03-2026

$ 61.19 USD
Free Shipping on orders $49 and up
Used to retract your serpentine belt tensioner. This kit includes 18mm, 5/8 in, 14mm, 13mm, 12mm, sockets and 3/8 in and 1/4 in drive adapters

Packaged by Turner - Corporate Logo
T#:23482931
Part#: S54KEVACCKT
Back Ordered
Sale - Save 2% $ 333.99

This product was last offered at the strikethrough price on
05-03-2026

$ 327.68 USD
Free Shipping on orders $49 and up
Sale - Save 2%
$ 333.99

This product was last offered at the strikethrough price on
05-03-2026

$ 327.68 USD
Free Shipping on orders $49 and up
Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belts, tensioner assemblies, and new tensioner pulleys. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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OEM Accessory Belt Kit - E46 M3
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:554437
Part#: E46M3ACCKT
Back Ordered
$ 350.99

This product was last offered at the strikethrough price on
08-24-2026

$ 307.99 USD
Free Shipping
$ 307.99 USD
Free Shipping

Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or over heated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need replaced such as the belts, tensioners, and hardware.

Fits the following BMWs:
2001-2006 E46 BMW M3

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Febi Mechanical A/C Belt Tensioner Assembly - BMW M52TU M54
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:38419099
Part#: 11281433571
Ships in 1 day
$ 64.99 USD
Free Shipping on orders $49 and up
$ 64.99 USD
Free Shipping on orders $49 and up
Keeping all of your belts tight is imperative to making everything in your vehicle functioning. If your A/C belt tensioner pulley is not keeping enough tension on your belt, your entire A/C system won't work as effectively. A usual sign that your tensioner needs replacing is if your belt keeps slipping causing the system to "squeal".
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