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BMW Drive Belts & V-Belts for BMW E90 M3 S65 4.0L

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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 6 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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ECS Tuning Performance Kevlar Reinforced Accessory Belt - Water Pump ...

10X Entries Into Our F80 M3 Sweepstakes

T#:20979672

Part#: 6PK1460

Ships on Nov 12, 2026

$ 33.99 USD

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$ 33.99 USD

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Replaces BMW # 11287837898 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. ECS Tuning Performance Kevlar reinforced belts have been put through a series of multiple tests such. Tensile strength Elongation Hardness Temperature and oil resistance per standard JASO E 109-94 Flex testing per SAE J2432.

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ECS Tuning Performance Kevlar Reinforced Accessory Belt - Air Conditi...

For vehicles with production date from 04/2008

10X Entries Into Our F80 M3 Sweepstakes

T#:3872372

Part#: 6DPK1105

In Stock

$ 30.99 USD

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$ 30.99 USD

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Replaces BMW # 11287841529 ECS Tuning Performance Kevlar-reinforced belts give you that extra peace 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. ECS Tuning Performance Kevlar-reinforced belts have been put through a series of multiple tests: Tensile strength Elongation Hardness Temperature and oil resistance per standard JASO E 109-94 Flex testing per SAE J2432.

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OEM Belt and Tensioner Service Kit for Power Pulley Kit - E9X M3 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:391555

Part#: S65LPPK-BELTKT

Ships in 1-2 days

$ 928.99 USD

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$ 928.99 USD

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We’ve put together the Ultimate Belt & Tensioner Renewal Kit, curated specifically for M3 owners running our Turner E9X M3 Pulley Upgrade. Designed to restore factory fresh mechanical precision while maintaining high performance reliability

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OEM Accessory Belt Service Kit - E9X M3 S65

For vehicles with production date from 04/2008

10X Entries Into Our F80 M3 Sweepstakes

T#:391554

Part#: 11287837898

Ships in 1 day

$ 964.99

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

Starting at $ 960.99 USD

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Starting at $ 960.99 USD

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This comprehensive kit includes both belts, belt tensioners, upper and lower deflection pulleys, and the adjusting pulley. Select from all Genuine BMW parts or a combination of OEM/OE BMW parts. Staying on top of your belt maintenance is the smart move. Cracked or worn belts are a recipe for a headache or worse. The main drive belt runs critical components - the alternator, water pump, and power steering pump. The pulleys contain bearings that may be worn when it comes time to replace the belts. You can check the pulleys by relieving tension on the belt and feeling each pulley for play or grinding. The tensioner also sees similar wear. If your pulleys are new or don't need replacement, you can pick up the belts on their own.

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Meyle Idler Pulley

For vehicles with a production date up to 04/2008

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:369422

Part#: 11287841228

In Stock

Sale - Save 60% $ 32.63

This product was last offered at the strikethrough price on
05-02-2026

$ 13.00 USD

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Sale - Save 60%

$ 32.63

This product was last offered at the strikethrough price on
05-02-2026

$ 13.00 USD

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Runs on water pump and alternator belt, used on both mechanical and hydraulic tensioner systems

Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E9X M3 S65 ...

For vehicles with production date from 04/2008

10X Entries Into Our F80 M3 Sweepstakes

T#:23416553

Part#: 11287841529KT

Ships on Nov 12, 2026

$ 1,038.99 USD

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$ 1,038.99 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 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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Meyle V-ribbed AC Belt - E9x - M3 - S65

5X Entries Into Our F80 M3 Sweepstakes

T#:55497380

Part#: 500061065

Ships on Oct 30, 2026

$ 6.99 USD

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$ 6.99 USD

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Meyle components are renowned for meeting or exceeding original equipment standards. This V-ribbed belt utilizes advanced synthetic rubber compounds designed to withstand high RPMs, extreme engine bay temperatures, and rigorous driving conditions.

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Meyle - Auxiliary Belt - E46, E90, E92, E93, Z3, Z4

5X Entries Into Our F80 M3 Sweepstakes

T#:40546016

Part#: 11287830945

Ships on Oct 30, 2026

$ 15.99 USD

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$ 15.99 USD

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A high-quality, OE-style replacement serpentine belt designed to deliver reliable power to critical engine components, ensuring optimal performance and durability.

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