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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

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

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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Active Autowerke Power Pulley Kit - E9x M3

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
For vehicles with production date 2007-5/2008

T#:397285

Part#: 13-001

Ships in 4 Business Days

5% off MSRP $ 399.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 379.99 USD

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5% off MSRP

$ 399.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 379.99 USD

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Easy to install - reduces parasitic losses from belt driven auxiliary components. Engine crankshaft pulley remains the same, this modification simply unleashes untapped potential from your vehicle. Expect to see gains around 10 RWHP from your S65. All BMW power pulleys included, including alternator, water pump, and power steering pulleys.

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VAC M62 Underdrive Power Pulley Set (09/1998+)

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

T#:928436

Part#: VAC-UPPS-M62-99

Ships in 9 Business Days

$ 329.99 USD

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$ 329.99 USD

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VAC Underdrive Power Pulley Sets for the M60 release 8.5 horsepower @ 5800 RPM and 8 lb/ft of torque @ 4500 RPM (measured @ the wheels.) Always made using only virgin billet 6061 T6 aluminum, an anodized finish, and the tightest tolerances; VAC's pulleys are used on some of the fastest BMWs on the planet. A lightweight design optimizes performance and response while under-driving components just the right amount for proper function at all RPMs.

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VAC Underdrive Power Pulley Set - S14

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

T#:598754

Part#: VAC-UPPS-S14-3-G

Ships on Nov 16, 2026

$ 334.99 USD

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$ 334.99 USD

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Made using only virgin billet aluminum, a hard anodized finish, and the tightest tolerances, VAC's pulley sets are used on some of the fastest S14s on the planet. This lightweight design optimizes performance and response while under-driving components just the right amount for proper function. Perfect for track cars, they can also be used on a street car without any problems. Features: Reduces pump cavitation at higher rpm's Saves weight when every bit counts Includes new, correct length, labeled Contitech belts for WP, ALT, P/S

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MINI R52 R53 M7 Gen 1 Power Up Kit - Supercharger Overdrive Pulley Ki...

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

T#:1150752

Part#: 53-3M7700-1

Ships in 2 Business Days

Sale - Save 5% $ 368.99

This product was last offered at the strikethrough price on
08-31-2026

$ 350.12 USD

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Sale - Save 5%

$ 368.99

This product was last offered at the strikethrough price on
08-31-2026

$ 350.12 USD

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M7 Lightweight Crank Pulley - 4% Overdrive - R52 / R53

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

T#:584439

Part#: 53-3M7101-4

Back Ordered

Sale - Save 5% $ 159.99

This product was last offered at the strikethrough price on
08-31-2026

$ 151.77 USD

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Sale - Save 5%

$ 159.99

This product was last offered at the strikethrough price on
08-31-2026

$ 151.77 USD

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M7 Speed 4% Oversize Crankshaft Pulley for MINI Cooper

Unlocking Performance

The M7 Speed 4% oversize crankshaft pulley is your ticket to unlocking the hidden potential of your MINI Cooper. This performance-enhancing pulley is designed to add power, acceleration, and overall performance to your beloved MINI. Here's how it does the trick:

Performance Boost:

Safely speeds up your supercharger, delivering a significant "low end" boost and torque.
The result? Your MINI Cooper takes off with newfound energy and responsiveness.

Lightweight Advantage:

Weighing just 13 ounces, this pulley is a remarkable 88.5% lighter than the factory version.
Reduced crankshaft rotational mass equals more horsepower, torque, and improved throttle response.

Advanced Design

The M7 Speed 4% Crank Pulley isn't just about performance; it's also a work of art. Crafted with advanced computer modeling and precision CNC machining, it's a blend of form and function:

Materials:

Made in the USA from billet 6061-T6 aerospace-grade aluminum alloy.
Features a deep black anodized coating and laser etching for a sleek look.

Precision Machining:

Micro V-Belt grooves meet SAE J1459 specifications to minimize belt slippage, especially at maximum boost.

Optimal Fit:

Use it in conjunction with the M7 Speed 16% Supercharger Technology Pulley for peak performance in MINI tuning.

Reliable Performance

From the factory, MINI lacks a positive drive key on the crankshaft snout to drive the lower pulley. Most aftermarket pulleys are slip-fit and rely on the bolt to prevent slippage. The M7 Speed crank pulley is engineered differently:

Interference Fit:

The pulley is interference-fit onto the crankshaft, ensuring zero slippage even at high RPMs.

Features at a Glance:

Super Lightweight: Only 13 ounces (0.3 kg)
Sheds 6.2 lbs (2.8 kg) compared to stock
Achieves perfect balance through a symmetric design and precision machining
Includes a high-quality ARP Racing bolt and precision ground flat washer
Installation is a breeze

Unleash Your MINI's Potential

Proudly made in the USA, the M7 Speed 4% Oversize Crankshaft Pulley is the upgrade your MINI Cooper deserves. Unleash its hidden power and enjoy a new level of performance, reliability, and overall driving pleasure. Get ready to experience the difference.

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BMW Drive Belts & V-Belts

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E9X M3 Performance Underdrive Pulley Kit

Active Autowerke Power Pulley Kit - E9x M3

VAC M62 Underdrive Power Pulley Set (09/1998+)

VAC Underdrive Power Pulley Set - S14

MINI R52 R53 M7 Gen 1 Power Up Kit - Supercharger Overdrive Pulley Ki...

M7 Lightweight Crank Pulley - 4% Overdrive - R52 / R53

M7 Speed 4% Oversize Crankshaft Pulley for MINI Cooper

Unlocking Performance

Performance Boost:

Lightweight Advantage:

Advanced Design

Materials:

Precision Machining:

Optimal Fit:

Reliable Performance

Interference Fit:

Features at a Glance:

Unleash Your MINI's Potential

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