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BMW Drive Belts & V-Belts

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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Crank Seal Guard - N52/N54/N55/S55
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Turner Motorsport - Corporate Logo
T#:15876877
Part#: 049453LA01-02
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06-14-2026

$ 99.99 USD
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Introducing our Turner Motorsport Crank Seal Guard – the essential shield for your BMW's engine integrity. Safeguarding the heart of your vehicle, this meticulously designed guard offers robust protection for the crank seal concealed behind the harmonic balancer.

Considered an indispensable maintenance component for your BMW, the Crank Seal Guard acts as a crucial defense against a potential and preventable catastrophe involving your accessory belt. Facing the reality of potential oil or coolant leaks in your engine, this guard becomes a reliable barrier, preventing these fluids from reaching the accessory belt. The consequence of a compromised belt includes walking, slipping, fraying, and rubber particles finding their way behind the harmonic balancer and into the crank seal – a scenario that can lead to severe engine failure.

Let's be honest, engine leaks are a common occurrence, and whether your engine is currently leaking or not, the Crank Seal Guard is a proactive measure against future threats. The wear and tear on the accessory belt due to oil and coolant exposure can result in slipping, tearing, or, worst-case scenario, belt snapping – posing a significant risk to your engine's well-being.

Prepare your car for the long haul and protect the vital components, It's not a matter of "if" but "when" your belt will become a problem, and our Crank Seal Guard is your proactive solution. Rigorously tested on N52/N54/N55 and S55 for 100% confirmed fitment, it stands as a reliable guardian for your engine's health. Invest in the protection your BMW deserves with the Turner Motorsport Crank Seal Guard.

Key benefits:

Protect crank seal from rogue accessory belts and their shredded debris
Optimized to fit N52, N54, N55, and S55 engines
Rigid design that fits within the space constraints between the engine block and harmonic balancer
Zinc-coated fasteners for corrosion and oxidation resistance
Design:

Modeled and designed from FARO laser scanning and Solidworks CAD
Manufactured from 6061 billet aluminum
Turner blue anodizing
Installation:

It is a good idea to note how your belt is routed before starting the installation.

2 securing bolts for crank seal guard - Torque value of 20Nm

You will find either 6 or 8 E10 bolts are holding the harmonic balancer depending on the engine.

E10 (P#11237564511) ​
​N52: 6 bolts - Torque value of 25nm
N54: 6 bolts - Torque value of 35nm
N55: 8 bolts - Torque value of 35nm

E10 (P#11237575488)
S55: 8 Bolts - Torque value of 35nm

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW N55 F-Chas...
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Packaged by Turner - Corporate Logo
T#:22097553
Part#: 11287628661TKT
Ships on Feb 23, 2027
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$ 101.98 USD
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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 Belt, tensioner assembly, and idler pulley. 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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Lower Idler Pulley
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Bremmen Parts - Corporate Logo
T#:32350850
Part#: 11287557851
In Stock
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$ 23.79 USD
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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW E82/88 E9X...
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Packaged by Turner - Corporate Logo
T#:22163422
Part#: 11287568247TKT
Ships on Dec 8, 2026
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05-03-2026

$ 168.27 USD
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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 Belt, tensioner assembly, and idler 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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Accessory Belt Tensioner Assembly
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Bremmen Parts - Corporate Logo
T#:32350851
Part#: 11288604266
In Stock
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05-03-2026

$ 48.59 USD
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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW N52 ...
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Packaged by Turner - Corporate Logo
T#:22130432
Part#: 11287530314TKT
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$ 104.71 USD
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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 Belt, tensioner assembly, and idler pulley. 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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Mechanical A/C Belt Tensioner Assembly
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Bremmen Parts - Corporate Logo
T#:26305100
Part#: 11281433571
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$ 47.32 USD
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Accessory Belt Tensioner - Mechanical
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Bremmen Parts - Corporate Logo
T#:32450133
Part#: 11288570439
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$ 75.06 USD
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Upper Idler Pulley
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Bremmen Parts - Corporate Logo
T#:26305073
Part#: 11287556251
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VTT Billet Power Steering Pulley - N54
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Vargas Turbo Technologies - Corporate Logo
T#:7292042
Part#: VTT-N54-PSN54
Ships in 2 Business Days
Starting at $ 56.99 USD
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Starting at $ 56.99 USD
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Vargas has introduced their new Billet Power Steering pulleys for the N54 engine! A well-known issue with the N54 with Hydraulic power steering is the plastic pulley either hitting the subframe, or breaking on its own. This can result in the belt to be ejected from the pulley, and leave you stranded with no serpentine belt. This also increases the chance of sucking the belt into the engine through the front seal. Put an end to the dreaded plastic PS pulley issues with the VTT 100% Billet Aluminum PS pulley. These are constructed from 6061-T6 aluminum and anodize in one of 4 colors (Black, Red, Blue, and Clear) for a great look, and long-lasting finish. These weigh 11oz, very close to the weight of a stock pulley, and are lighter than the cast aluminum versions on the market.
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Accessory Belt Tensioner Assembly
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Bremmen Parts - Corporate Logo
T#:29101657
Part#: 11287563927
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Deflection Pulley
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Bremmen Parts - Corporate Logo
T#:34080699
Part#: 11287578674
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$ 22.84 USD
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Deflection Pulley
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Bremmen Parts - Corporate Logo
T#:32450136
Part#: 11288673720
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Bremmen Belt Tensioner Assembly -- E60 E61 E70 E82 E88 E9X Z4 ...
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Bremmen Parts - Corporate Logo
T#:39497969
Part#: 11287530314
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This tensioner keeps the belt for the alternator, power steering, and air conditioning taut to provide maximum performance of each system.
N54 AC Delete Accessory Belt Kit - BMW N54 3.0L
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T#:26771665
Part#: 7PK1660KT
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$ 66.28 USD
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This AC Delete Accessory Belt Kit includes a new idler pulley and a shorter ECS Kevlar belt for deleting your AC compressor. ECS Tuning Performance Kevlar reinforced belts give you that extra piece of mind! 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. Tensile strength Elongation Hardness Temperature and oil resistance per standard JASO E 109-94 Flex testing per SAE J2432
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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - F3X F10 N20 2....
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Packaged by Turner - Corporate Logo
T#:22097555
Part#: 11287618848TKT
Ships on Dec 8, 2026
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$ 70.48 USD
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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 Belt and an OEM tensioner assembly. 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 tensioner and upgrading your accessory belt 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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Accessory Belt Tensioner Assembly
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Bremmen Parts - Corporate Logo
T#:32350878
Part#: 11287594969
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$ 40.79 USD
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Mechanical A/C Belt Tensioner Assembly
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Bremmen Parts - Corporate Logo
T#:32350880
Part#: 11287512758
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$ 45.04 USD
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Belt Tensioner
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Bremmen Parts - Corporate Logo
T#:32450132
Part#: 11287549873
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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - F07/10 F06/12/...
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T#:23482929
Part#: 8PK1478TKT
Ships on Nov 12, 2026
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$ 129.72 USD
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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 Belt, tensioner assembly, and new 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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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - F8X S55 ...
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Packaged by Turner - Corporate Logo
T#:22163426
Part#: 11287848605TKT
Ships on Nov 12, 2026
$ 414.99

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08-07-2026

$ 385.99 USD
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Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes ECS Kevlar Reinforced Drive Belts, tensioner assembly, and idler 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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S54 Turner Motorsport Ultimate Power Pulley And Drive Belt Overhaul S...
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T#:15710772
Part#: 11281730349-KT
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$ 494.69 USD
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The idea of power pulleys is simple. The less effort the engine puts into running accessories such as the water pump, power steering, pump alternator etc., the more of that power can be used elsewhere - your wheels! The way this is done by reducing the rotation of the pulleys by as much as 10-20%! The end result is more horsepower at your disposal. Turner has done extensive testing (on and off the track), to ensure that the accessory systems still function as intended and without failure. These pulleys offer an excellent compromise of power gains, reliability and performance. All Turner pulleys are constructed of high quality T-6061 aluminum for durability and longevity. They are also finished in a black hard anodizing, which is highly resistant to wear including chemical and heat exposure. They have been designed to carry stock-like aesthetics, but with increased strength properties and lighter weight. Because of the durable aluminum construction, you can also put the worries of a serious plastic failure to rest. These pulleys will last, all the while increasing horsepower too! While you're installing your Power Pulley Kit, it makes sense to overhaul your Accessory Belt System as well, so this kit includes our Accessory Belt Kit as well.
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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - F22/23 F3X B58...
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Packaged by Turner - Corporate Logo
T#:22097533
Part#: 11288613707TKT
Ships on Nov 16, 2026
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$ 105.35 USD
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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 Belt, tensioner assembly, and the hardware required to install the new tensioner. 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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Performance Accessory Belt Kit - Kevlar Reinforced - BMW B46TU/B48TU...
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T#:29798952
Part#: 11288650740T1KT
Ships on Nov 16, 2026
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$ 105.35 USD
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Having your accessory belt fail is a major inconvenience and can leave you on the side of the road if the alternator isn't charging and the mechanical water pump isn't turning. Over time the tensioner and the belt itself wears out and will eventually fail. This kit includes everything you need to service the belt drive system and keep everything in check. Included: ECS Tuning Kevlar Reinforced Performance Accessory Belt - Designed to resist OEM Febi Belt Tensioner Genuine BMW Tensioner Hardware
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A/C Belt Tensioner - 11281717210
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Bremmen Parts - Corporate Logo
T#:36913367
Part#: 11281717210
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Also known as a shock damper, the accessory belt tensioner is used to tension the air conditioning compressor belt. This ensures proper contact with the belt drive pulleys and prevents premature wear from improper tension.

If your belt is wearing prematurely or has excess slack, your belt tensioner may be to blame. Replace it with this high-quality Bremmen Parts tensioner to ensure proper tension and air conditioning functionality.

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Hydraulic Alternator Belt Tensioner Conversion Kit
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Packaged by Turner - Corporate Logo
T#:15710833
Part#: 11287838797-KT
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The original mechanical design is has been discontinued by BMW. So now Turner offers this complete hydraulic tensioner conversion kit for your BMW alternator/water pump/power steering belt. Changes the old style mechanical design to the updated hydraulic design recommended by BMW. Includes the following parts Hydraulic Tensioner Adjusting Pulley Caps & Dust Guards Securing Hardware
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Idler Pulley
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Bremmen Parts - Corporate Logo
T#:34080698
Part#: 11287578675
In Stock
Sale - Save 21% $ 27.99

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05-03-2026

$ 22.02 USD
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$ 27.99

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E36 Z3 M52 S52...
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Packaged by Turner - Corporate Logo
T#:22130428
Part#: 11281437929TKT
Ships on Nov 16, 2026
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05-03-2026

$ 204.94 USD
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Eliminate your squeaking accessory belt pulleys and cracked drive belts with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belt, an OEM A/C belt, belt tensioners, an idler pulley, and the hardware required for installation 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 belts, rollers, and 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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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW E82/88 E9X...
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Packaged by Turner - Corporate Logo
T#:22163417
Part#: 11287582946TKT
Ships on Dec 8, 2026
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09-16-2026

$ 204.63 USD
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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 Belt, belt tensioner, and idler pullies. 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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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW E60 N54 3....
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Packaged by Turner - Corporate Logo
T#:22163416
Part#: 4485241TKT
Ships on Dec 8, 2026
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This product was last offered at the strikethrough price on
05-03-2026

$ 136.47 USD
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$ 177.99

This product was last offered at the strikethrough price on
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$ 136.47 USD
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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 Belt, belt tensioner, and idler pullies. 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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Deflection Pulley - Priced Each
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Bremmen Parts - Corporate Logo
T#:32450135
Part#: 11287790448
In Stock
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05-03-2026

$ 21.24 USD
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$ 26.99

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Accessory Belt Kit
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Packaged by Turner - Corporate Logo
T#:15744006
Part#: 11281469266KT-KT
Ships in 1 Business Day
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06-16-2026

$ 187.00 USD
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Having your accessory belt fail is definitely inconvenient, and can leave you on the side of the road if the alternator isn't charging. Over time the tensioner and the belt itself gets worn and will eventually fail. Turner Motorsport has assembled a convenient kit with this in mind. This kit includes everything you need to service the belt drive system and keep everything in check. This kit includes: Continental accessory belts Ruville A/C belt tensioner URO idler and belt tensioner pulleys LUK hydraulic tensioner assembly Idler pulley securing bolt
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Serpentine Belt Kit - S58
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Packaged by Turner - Corporate Logo
T#:41661237
Part#: 11288581628T1KT
Ships in 1 day
$ 305.99 USD
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Ensure your BMW S58-powered vehicle continues to perform at its best with this reliable and performance-oriented serpentine belt kit.

Water Pump/Alternator Accessory Belt Service Kit w/ Kevlar Reinforced...
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Packaged by Turner - Corporate Logo
T#:22097556
Part#: 6PK1548TKT
Ships on Feb 23, 2027
$ 129.99 USD
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Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Accessory Belt, tensioner assembly, and your idler pulley. 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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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E46 M3, Z3M, Z...
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Packaged by Turner - Corporate Logo
T#:23482931
Part#: S54KEVACCKT
Ships on Nov 16, 2026
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This product was last offered at the strikethrough price on
05-03-2026

$ 285.88 USD
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Sale - Save 14%
$ 333.99

This product was last offered at the strikethrough price on
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$ 285.88 USD
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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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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E90 335d M57 ...
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Packaged by Turner - Corporate Logo
T#:23416570
Part#: 11287792059TKT
Back Ordered
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06-01-2026

$ 231.25 USD
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$ 240.99

This product was last offered at the strikethrough price on
06-01-2026

$ 231.25 USD
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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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Belt - Main Drive and A/C Belt Set for Turner Pulley Kit - E60 M5, E6...
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Packaged by Turner - Corporate Logo
T#:16580
Part#: E60-M5-UDP-BELTS
Ships in 5 Business Days
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05-03-2026

$ 48.44 USD
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These are the replacement drive belts used in our Turner Pulley Kit on the S85 V10 engine (E60 M5 and E63/E64 M6). These belts are shorter than the stock belt since our underdrive crank pulley is a larger diameter than stock. Because of the different lengths, you cannot use a stock belt with the Pulley Kit. This set of belts includes the main drive belt (6PK-1400) and the A/C belt (6PK-1045).

This belt set fits the following BMWs with the Turner Pulley Kit:
2006-2010 E60 BMW M5
2004-2011 E63 E64 BMW M6
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Accessory Belt Service Kit - OEM Continental Belt - BMW B46TU/B48TU B...
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Packaged by Turner - Corporate Logo
T#:29798955
Part#: 11288650740T2KT
In Stock
Sale - Save 19% $ 121.99

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

$ 98.77 USD
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Sale - Save 19%
$ 121.99

This product was last offered at the strikethrough price on
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$ 98.77 USD
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Having your accessory belt fail is a major inconvenience and can leave you on the side of the road if the alternator isn't charging and the mechanical water pump isn't turning. Over time the tensioner and the belt itself wears out and will eventually fail. This kit includes everything you need to service the belt drive system and keep everything in check. Included: OEM Continental Accessory Belt OEM Febi Belt Tensioner Genuine BMW Tensioner Hardware
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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW N63 S63 ...
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Packaged by Turner - Corporate Logo
T#:23516122
Part#: 11287631824TKT
In Stock
$ 220.99

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10-05-2026

$ 215.99 USD
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$ 215.99 USD
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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 Belt, replacement A/C belt, and a new tensioner. 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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Hydraulic Alternator Belt Tensioner Assembly
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Bremmen Parts - Corporate Logo
T#:55030822
Part#: 11287838797
Ships in 7 Business Days
New Item
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10-08-2026

$ 53.99 USD
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$ 59.99

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E46 E39 M54 ...
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Packaged by Turner - Corporate Logo
T#:23482922
Part#: 4PK863ATKT
In Stock
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05-03-2026

$ 205.13 USD
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This product was last offered at the strikethrough price on
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$ 205.13 USD
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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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Alternator Pulley
10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
Bremmen Parts - Corporate Logo
T#:52164889
Part#: 12317560483
In Stock
Sale - Save 15% $ 45.99

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09-16-2026

$ 39.09 USD
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$ 45.99

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Is your BMW making a chirping or grinding noise at idle? The culprit is frequently a failing alternator decoupler pulley. Unlike a traditional solid pulley, this Overrunning Alternator Pulley (OAP) allows the alternator rotor to "freewheel" when engine speeds drop suddenly. This specialized function protects your BMW drive belt and belt tensioner from excessive snap-back, vibration, and "belt slap."

Prevent Catastrophic Engine Failure

Over time, the internal clutch mechanism can seize or slip, leading to accelerated wear or total serpentine belt failure. On BMW engines, a snapped belt can be ingested through the front main seal, causing catastrophic engine damage. Replacing this pulley is a cost-effective preventative maintenance step that restores smoothness to your accessory drive without the high cost of a complete alternator replacement.

Features & Benefits:

Lowers the load on the drive belt, tensioner, and AC compressor.
Stops "belt slap" and rhythmic chirping noises during deceleration and idle.
Direct Replacement with high-quality construction ensures perfect fitment and long-term durability.
Essential Maintenance for N52 engines

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW N47 N57 ...
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Packaged by Turner - Corporate Logo
T#:23516116
Part#: 6PK1697TKT
Ships in 1 Business Day
$ 206.99

This product was last offered at the strikethrough price on
07-15-2026

$ 196.99 USD
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$ 196.99 USD
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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 Belt, tensioner assembly, and new tensioner bolts. 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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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E39 540i, E38 ...
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Packaged by Turner - Corporate Logo
T#:23416543
Part#: 11287636377TKKT
Back Ordered
$ 364.99

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10-27-2026

$ 361.99 USD
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$ 361.99 USD
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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 Belt, 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 Service Kit - E36 325 M3 S50 M50
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Packaged by Turner - Corporate Logo
T#:593731
Part#: E36S50ABSKT
Ships in 1 Business Day
$ 206.33

This product was last offered at the strikethrough price on
10-27-2026

$ 196.76 USD
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$ 196.76 USD
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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 overheated 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.
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Idler Pulley
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Bremmen Parts - Corporate Logo
T#:30629656
Part#: 11287841228
In Stock
Sale - Save 22% $ 19.99

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05-03-2026

$ 15.50 USD
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$ 19.99

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Accessory Belt Service Kit - HD Gates Belt - BMW B46TU/B48TU B58TU ...
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Packaged by Turner - Corporate Logo
T#:29798950
Part#: 11288650740TKT
In Stock
Sale - Save 13% $ 141.99

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05-03-2026

$ 123.62 USD
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Sale - Save 13%
$ 141.99

This product was last offered at the strikethrough price on
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$ 123.62 USD
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Having your accessory belt fail is a major inconvenience and can leave you on the side of the road if the alternator isn't charging and the mechanical water pump isn't turning. Over time the tensioner and the belt itself wears out and will eventually fail. This kit includes everything you need to service the belt drive system and keep everything in check. Included: Gates Green Heavy Duty Accessory Belt - Designed to exceed OE durability, felxibility, and longevity OEM Febi Belt Tensioner Genuine BMW Tensioner Hardware
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Accessory Belt Idler Pulley
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Bremmen Parts - Corporate Logo
T#:32350879
Part#: 11287615130
In Stock
Sale - Save 22% $ 22.99

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05-03-2026

$ 17.94 USD
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$ 22.99

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW 330e 530e ...
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Packaged by Turner - Corporate Logo
T#:22196328
Part#: 3PK968TKT
In Stock
Sale - Save 23% $ 121.99

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

$ 93.74 USD
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Sale - Save 23%
$ 121.99

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

$ 93.74 USD
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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 Belt and tensioner assembly. 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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Hex Bolt - MINI
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Bavarian Autosport - Corporate Logo
T#:16940487
Part#: 11217616164
In Stock
Sale - Save 23% $ 12.99

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05-03-2026

$ 9.99 USD
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$ 12.99

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$ 9.99 USD
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Used to attach the crank pulley / vibration dampener