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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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E9X M3 Performance Underdrive Pulley Kit
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Macht Schnell - Corporate Logo
T#:593749
Part#: 10.00.011
Ships in 8 Business Days
$ 349.00 USD
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$ 349.00 USD
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Free additional power to your M3’s rear wheels without sacrificing or compromising your BMW’s reliability. Machined from 6061-T6 aerospace aluminum, Macht Schnell Performance Underdrive Pulleys are strong as well as lightweight to limit parasitic drag from the accessories within a moderate level for maximum performance on or off the track. After machining and engraving, pulleys are then T3 hard anodized for additional strength, anti-corrosion & wear resistance. Our DualDrive design replaces the Crank Accessory & Power Steering Pulleys, resulting in an additional 9-14 HP and 7-9ft. lbs TQ gain for the M3. Gains are due to a reduction in power required to turn accessories; an increase in accessories lifespan due to lower speed will also result. All factory harmonics/balancing are undisturbed. Macht Schnell Performance Underdrive Pulleys have no negative effect on accessory operation and comes fully equipped with new belts. Already have this kit and need new belts? See T#14491 and T#14489 Performance Underdrive Pulleys Features: DualDrive design allows maximum performance, with minor effect on accessory speed Proper cooling temperatures are retained at proper levels on or off the track Maintains proper alternator speed, allowing sustained levels to sensitive control modules Machined from 6061-T6 aerospace aluminum T3 Hard-Anodized for maximum strength and corrosion/wear resistance No affects to crankshaft dampening or harmonics Simple bolt-on installation
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S54 VAC Harmonic SuperDamper By ATI - Standard Size Crank Pulley ...
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ATI Performance Products - Corporate Logo
T#:639878
Part#: VAC-HPCDK-S54-ST
In Stock
$ 1,049.99 USD
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$ 1,049.99 USD
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If you are breaking crankshafts and oil pumps, the cause may be a mystery to you as it has been to many of our customers. We know that controlling the harmonic resonance of the BMW 6 is highly important as RPMs rise, but the ideal configuration of the inline-6 motor makes even experienced engine builders overlook some fundamental principals of engine harmonics that can be destructive. ATI Performance Products has partnered with VAC Motorsports to develop new dampers for BMW 2.5L, 2.8L, 3.0L and 3.2L straight-6 engines found in the E36 and E46 M3, E9X and E6X, as well as newer Z3s and Z4s. These dampers eliminate crankshaft harmonic vibration, which allows the engine to produce more horsepower and torque, while also reducing internal engine wear at the same time. Broken oil pumps and timing chains will be a thing of the past! When used with a VAC accessory pulley, these dampers are a direct replacement over the OEM balancer. They have a 7” outer diameter and include OEM style timing alignment tabs. BMW enthusiasts should know that all ATI Super Dampers exceed SFI 18.1 Safety Certification and are approved for competition. The advantages of the ATI SuperDamper include eliminating vibration issues with inline 6 engines equipped with lightweight clutch and flywheel assemblies, reduced bearing, engine accessories, oil pump wear, and compatibility with underdrive pulleys. Made in the USA.
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ATI Super Damper Harmonic Damper - 5.67" Stock Size
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ATI Performance Products - Corporate Logo
T#:22756711
Part#: 917992
In Stock
$ 370.99 USD
Free Shipping on orders $49 and up

The ATI Super Damper, meticulously designed for late-model 1.6L Mini Cooper engines, stands as the top choice and a rarity with its SFI 18.1 Certification, ensuring optimum performance for your MINI Cooper.

Key Features:

  • Compatible with 2001-2006 Mini Cooper and Mini Cooper S models.
  • Effectively dampens torsional crankshaft vibrations across all RPM levels.
  • Provides protection against engine harmonics.
  • A direct replacement for the OEM unit, ensuring ease of installation.
  • Equipped with a 6-rib serpentine belt drive for reliable performance.
  • Laser-etched timing marks for precision.
  • SFI 18.1 Certified for competition use, meeting rigorous standards.
  • Note: A belt tensioner tool is required to remove or replace the factory belt, and the ATI puller is not compatible with this damper.

Specifications:

  • Shell Material: Aluminum, 6-rib
  • Hub Material: Steel 916102
  • Inertia Weight: 2.20 lbs, 3 ring
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VAC Harmonic S55 SuperDamper By ATI
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ATI Performance Products - Corporate Logo
T#:639880
Part#: VAC-HPCD-S55
Ships in 1 Business Day
$ 989.99 USD
Free Shipping
$ 989.99 USD
Free Shipping
If you are breaking crankshafts and oil pumps, the cause may be a mystery to you as it has been to many of our customers. We know that controlling the harmonic resonance of the BMW 6 is highly important as RPMs rise, but the ideal configuration of the inline-6 motor makes even experienced engine builders overlook some fundamental principals of engine harmonics that can be destructive. ATI Performance Products has partnered with VAC Motorsports to develop new dampers for BMW 2.5L, 2.8L, 3.0L and 3.2L straight-6 engines found in the E36 and E46 M3, E9X and E6X, as well as newer Z3s and Z4s. These dampers eliminate crankshaft harmonic vibration, which allows the engine to produce more horsepower and torque, while also reducing internal engine wear at the same time. Broken oil pumps and timing chains will be a thing of the past! When used with a VAC accessory pulley, these dampers are a direct replacement over the OEM balancer. They have a 7” outer diameter and include OEM style timing alignment tabs. BMW enthusiasts should know that all ATI Super Dampers exceed SFI 18.1 Safety Certification and are approved for competition. The advantages of the ATI SuperDamper include eliminating vibration issues with inline 6 engines equipped with lightweight clutch and flywheel assemblies, reduced bearing, engine accessories, oil pump wear, and compatibility with underdrive pulleys. Includes lightweight VAC Billet Crankshaft Pulley. Made in the USA.
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ATI Super Damper Harmonic Damper - 5.75" 2% OD - W11 1.6L
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ATI Performance Products - Corporate Logo
T#:22756691
Part#: 917993
In Stock at Vendor
$ 370.99 USD
Free Shipping on orders $49 and up

ATI Super Damper for Enhanced MINI Cooper Performance

Upgrade your MINI Cooper with the ATI Super Damper, a top-rated and SFI 18.1 Certified replacement. Designed to fit 2001-2006 Mini Cooper and Mini Cooper S models, this damper is engineered to dampen torsional crankshaft vibrations across all RPM levels, ensuring smooth and reliable performance. It serves as a vital shield against engine harmonics and is a direct replacement for the OEM unit. The 6-rib serpentine belt drive and laser-etched timing marks offer precision and accuracy. Please note that a belt tensioner tool is necessary for removing or replacing the factory belt, and the ATI puller is not compatible with this damper.

Key Features:

  • SFI 18.1 Certified for competition use
  • Provides effective torsional crankshaft vibration damping
  • Direct replacement for the OEM unit
  • 6-rib serpentine belt drive
  • Laser-etched timing marks for precision

Specifications:

  • Shell Material: Aluminum, 6-rib
  • Hub Material: Steel 916102
  • Inertia Weight: 2.20 lbs, 3 ring
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ATI Super Damper Harmonic Damper Stock Size B46/B48 - 3 Ring ...
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ATI Performance Products - Corporate Logo
T#:33047043
Part#: 917999
In Stock at Vendor
$ 383.99 USD
Free Shipping on orders $49 and up

Water Pump/Alternator Accessory Belt Service Kit w/ Kevlar Reinforced...
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
Packaged by Turner - Corporate Logo
T#:22097556
Part#: 6PK1548TKT
Ships on Feb 23, 2027
$ 129.99 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 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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VAC Harmonic SuperDamper By ATI - BMW S50B32 EURO
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ATI Performance Products - Corporate Logo
T#:7355606
Part#: HPCDK-S50B32-S
Ships in 3 Business Days
$ 1,099.99 USD
Free Shipping
$ 1,099.99 USD
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VAC V2 Harmonic SuperDamper By ATI - BMW N54 3.0L
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ATI Performance Products - Corporate Logo
T#:639879
Part#: VAC-HPCD-N54
Ships in 8 Business Days
$ 1,059.99 USD
Free Shipping
$ 1,059.99 USD
Free Shipping
If you are breaking crankshafts and oil pumps, the cause may be a mystery to you as it has been to many of our customers. We know that controlling the harmonic resonance of the BMW 6 is highly important as RPMs rise, but the ideal configuration of the inline-6 motor makes even experienced engine builders overlook some fundamental principals of engine harmonics that can be destructive. ATI Performance Products has partnered with VAC Motorsports to develop new dampers for BMW 2.5L, 2.8L, 3.0L and 3.2L straight-6 engines found in the E36 and E46 M3, E9X and E6X, as well as newer Z3s and Z4s. These dampers eliminate crankshaft harmonic vibration, which allows the engine to produce more horsepower and torque, while also reducing internal engine wear at the same time. Broken oil pumps and timing chains will be a thing of the past! When used with a VAC accessory pulley, these dampers are a direct replacement over the OEM balancer. They have a 7” outer diameter and include OEM style timing alignment tabs. BMW enthusiasts should know that all ATI Super Dampers exceed SFI 18.1 Safety Certification and are approved for competition. The advantages of the ATI SuperDamper include eliminating vibration issues with inline 6 engines equipped with lightweight clutch and flywheel assemblies, reduced bearing, engine accessories, oil pump wear, and compatibility with underdrive pulleys. Includes lightweight VAC Billet Crankshaft Pulley.
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VAC Harmonic SuperDamper By ATI - B58
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ATI Performance Products - Corporate Logo
T#:27605443
Part#: ATI-HPCD-B58
Ships on Nov 13, 2026
$ 389.99 USD
Free Shipping on orders $49 and up

Understanding the criticality of harmonic resonance in BMW inline-6 engines, ATI Performance Products has collaborated with VAC Motorsports to craft revolutionary dampers. Designed for BMW 2.5L, 2.8L, 3.0L, and 3.2L straight-6 engines in E36 and E46 M3, E9X, E6X, Z3s, and Z4s, these dampers tackle harmonic vibrations, unlocking heightened horsepower, torque, and longevity. Forget about broken oil pumps and timing chains!

Pairing seamlessly with VAC accessory pulleys, these 7" diameter dampers boast OEM-style timing alignment tabs, ensuring a direct fit over OEM balancers. Notably, all ATI Super Dampers exceed SFI 18.1 Safety Certification for competitive use, making them a must-have for BMW enthusiasts. Benefits extend to eliminating vibration issues with lightweight clutch and flywheel assemblies, reducing wear on bearings, engine accessories, and oil pumps, and harmonizing with underdrive pulleys.

Plus, each package includes the lightweight VAC Billet Crankshaft Pulley, proudly made in the USA for uncompromised quality assurance.

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VAC Harmonic SuperDamper By ATI - M50/S50/M52/S52
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ATI Performance Products - Corporate Logo
T#:639877
Part#: VAC-HPCD-M50-TR
Ships on Nov 13, 2026
$ 1,139.99 USD
Free Shipping
$ 1,139.99 USD
Free Shipping
If you are breaking crankshafts and oil pumps, the cause may be a mystery to you as it has been to many of our customers. We know that controlling the harmonic resonance of the BMW 6 is highly important as RPMs rise, but the ideal configuration of the inline-6 motor makes even experienced engine builders overlook some fundamental principals of engine harmonics that can be destructive. ATI Performance Products has partnered with VAC Motorsports to develop new dampers for BMW 2.5L, 2.8L, 3.0L and 3.2L straight-6 engines found in the E36 and E46 M3 as well as newer Z3s and Z4s. These dampers eliminate crankshaft harmonic vibration, which allows the engine to produce more horsepower and torque, while also reducing internal engine wear at the same time. Broken oil pumps and timing chains will be a thing of the past! When used with a VAC accessory pulley, these dampers are a direct replacement over the OEM balancer. They have a 7” outer diameter and include OEM style timing alignment tabs. BMW enthusiasts should know that all ATI Super Dampers exceed SFI 18.1 Safety Certification and are approved for competition. The advantages of the ATI SuperDamper include eliminating vibration issues with inline 6 engines equipped with lightweight clutch and flywheel assemblies, reduced bearing, engine accessories, oil pump wear, and compatibility with underdrive pulleys. Kit includes: Damper Lightweight VAC Billet Crankshaft Pulley Mounting and Installation Hardware Trigger Ring for OBD1 systems Note: Will NOT work with S50B30 & S50B32 Euro Engines, For Street/Track cars with Air Conditioning, the Additional A/C Pulley Option is REQUIRED as the OE A/C pulley is not compatible. The additional mounting and installation hardware is also included. Made in the USA
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Hex Bolt - N52, N54
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
Bavarian Autosport - Corporate Logo
T#:19792190
Part#: 11211439395
Ships on Nov 16, 2026
Sale - Save 20% $ 18.99

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

$ 15.19 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 18.99

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

$ 15.19 USD
Free Shipping on orders $49 and up
Replacement center bolt for the engine crank pulley.