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BMW Drive Belts & V-Belts for BMW 3 Series E93 (2007-2013)

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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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E9X M3 Performance Underdrive Pulley Kit

For vehicles with a production date from 05/2008+ & a counterclockwise rotating Power S...

T#:593749

Part#: 10.00.011

Ships in 5 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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Lower Idler Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:32350850

Part#: 11287557851

In Stock

Sale - Save 15% $ 27.99

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

$ 23.79 USD

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Sale - Save 15%

$ 27.99

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

$ 23.79 USD

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Accessory Belt Tensioner Assembly

10X Entries Into Our F80 M3 Sweepstakes

T#:29101657

Part#: 11287563927

In Stock

Sale - Save 17% $ 69.99

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

$ 57.79 USD

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Sale - Save 17%

$ 69.99

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

$ 57.79 USD

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Upper Idler Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:26305073

Part#: 11287556251

In Stock

Sale - Save 25% $ 31.99

This product was last offered at the strikethrough price on
07-14-2026

$ 23.99 USD

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Sale - Save 25%

$ 31.99

This product was last offered at the strikethrough price on
07-14-2026

$ 23.99 USD

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Deflection Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:34080699

Part#: 11287578674

In Stock

Sale - Save 21% $ 28.99

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

$ 22.84 USD

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Sale - Save 21%

$ 28.99

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

$ 22.84 USD

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Bremmen Belt Tensioner Assembly -- E60 E61 E70 E82 E88 E9X Z4 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:39497969

Part#: 11287530314

In Stock

Sale - Save 21% $ 54.99

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

$ 43.24 USD

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Sale - Save 21%

$ 54.99

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

$ 43.24 USD

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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.

Idler Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:34080698

Part#: 11287578675

In Stock

Sale - Save 21% $ 27.99

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

$ 22.02 USD

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Sale - Save 21%

$ 27.99

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

$ 22.02 USD

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Alternator Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:52164889

Part#: 12317560483

In Stock

Sale - Save 15% $ 45.99

This product was last offered at the strikethrough price on
09-16-2026

$ 39.09 USD

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Sale - Save 15%

$ 45.99

This product was last offered at the strikethrough price on
09-16-2026

$ 39.09 USD

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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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Deflection Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:26305076

Part#: 11287535860

In Stock

Sale - Save 19% $ 20.99

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

$ 16.99 USD

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Sale - Save 19%

$ 20.99

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

$ 16.99 USD

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Idler Pulley

For vehicles with a production date up to 04/2008

10X Entries Into Our F80 M3 Sweepstakes

T#:30629656

Part#: 11287841228

In Stock

Sale - Save 22% $ 19.99

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

$ 15.50 USD

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Sale - Save 22%

$ 19.99

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

$ 15.50 USD

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Accessory Belt Tensioner Assembly

10X Entries Into Our F80 M3 Sweepstakes

T#:54995068

Part#: 11287582946

In Stock

Sale - Save 10% $ 52.99

This product was last offered at the strikethrough price on
10-08-2026

$ 47.69 USD

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Sale - Save 10%

$ 52.99

This product was last offered at the strikethrough price on
10-08-2026

$ 47.69 USD

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Double roller tensioner

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