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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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E36/E46/Z3/Z4 ECS Tuning Aluminum Water Pump Pulley - Black

T#:363707

Part#: 001977ECS03A

In Stock

Sale - Save 5% $ 104.99

This product was last offered at the strikethrough price on
06-13-2026

$ 99.74 USD

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Sale - Save 5%

$ 104.99

This product was last offered at the strikethrough price on
06-13-2026

$ 99.74 USD

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Most of the pulleys on your BMW engine are plastic, which become brittle and frail over time and from engine bay heat. A failed pulley could leave you stranded which is why it is vital to inspect the pulleys during routine maintenance. This is an aluminum version of the stock water pump pulley used on the M50/M52/M52TU/M54 engine in the E36, E46, Z3, Z4, and other models. It uses the same hardware and the original belt as the stock plastic pulley. But the aluminum will last much longer.

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Vargas "Spline Lock" Crank Hub Solution - Includes Crank Bolt Capture...

T#:558795

Part#: VTT-CRANKHUB-1

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$ 889.99 USD

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$ 889.99 USD

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Under certain conditions, the N55 crank hub likes to spin, without warning and even when the engine is in perfect health. The engineers at Vargas saw and dealt with this problem time and again, and they saw fit to do something about it. This hub uses a proprietary "Spline Lock" technology that uses high tolerance machined splines which press into the crank, and positively lock the hub to the crank. The splines are machined in such a way that rotational forces drive the hub, and splines deeper into the crank meaning when the hub encounters a situation that would normally slip a stock hub the splined hub is driven into the crank to keep it in place (much like a splined extractor). Features: Installs the same as a stock hub Does NOT require the crank to be drilled for pins Manufactured from Harndered 17-4SS We suggest the Crank Hub System ONLY be installed by a qualified shop or technician. Timing tools are 100% REQUIRED if installed improperly engine damage may occur. DISCLAIMER: VTT and ECS are not responsible for any engine damage caused by improper installation, or misuse of the crank hub solution.

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Vargas N54/55 Billet Crank Seal Guard - BMW N54 N55 3.0L

T#:638889

Part#: VTT-CRANKGUARD

In Stock

Starting at $ 89.99 USD

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Starting at $ 89.99 USD

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It is a well-known issue on the BMW N54/55 platforms that your serpentine belt can fail for various reasons. When this happens, there is a high chance of the belt getting sucked behind the front damper pulley and then being pushed past the crank seal into your oil pan. From there it can get sucked into the oil pick up causing total engine failure. Even if you do not lose the engine, it is a COSTLY repair to remove the sub-frame and drop the oil pan to remove the belt. The best way to combat this is to watch for oil leaks and keep up on your maintenance. BUT, even with those preventative measures, pre-mature belt failure can occur. This crank seal guard installs over your front crank seal and will keep the belt from being sucked in if a belt failure does occur. This is a cheap way to ensure you do not end up having to replace your motor from oil starvation due to an ingested belt. Vargas' seal is different from those already on market in two major ways. Firstly, it is not offensively priced. Secondly, it is 100% billet with no welds on the tabs to break, no cheap bent thin steel pieces. 100% Billet 6061-T6 aluminum, anodized black for long-term corrosion resistance. Crank Seal Guard includes: One VTT Billet N54/55 Crank Seal Guard Two extended 12.9 Grade bolts, and two stainless washers We highly recommend you install WITH a crank bolt capture at the same time, as you have to remove the damper anyway. Then you will get the benefit of helping eliminate the dreaded spun crank hub and the crank seal issue

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E46 M3, Z4M ECS Tuning Aluminum Water Pump Pulley

T#:367060

Part#: 002778ECS01

Ships on Dec 7, 2026

Sale - Save 10% $ 100.99

This product was last offered at the strikethrough price on
06-13-2026

$ 90.89 USD

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Sale - Save 10%

$ 100.99

This product was last offered at the strikethrough price on
06-13-2026

$ 90.89 USD

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Most of the pulleys on your BMW engine are plastic, which become brittle and frail over time and from engine bay heat. A failed pulley could leave you stranded which is why it is vital to inspect the pulleys during routine maintenance. This is an aluminum version of the stock water pump pulley used on the S54 engine in the E46 M3, MZ3, and Z4M. It's the same size and uses the same hardware and the original belt as the stock plastic pulley. But the aluminum will last much longer.

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Active Autowerke Power Pulley Kit - E9x M3

For vehicles with production date 2007-5/2008

T#:397285

Part#: 13-001

Ships in 3 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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Dinan Replacement Underdrive Pulley Belt For D560-0001 - Alternator/W...

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T#:21078444

Part#: D561-0006

Ships in 5 Business Days

Sale - Save 10% $ 63.99

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

$ 57.56 USD

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Sale - Save 10%

$ 63.99

This product was last offered at the strikethrough price on
07-31-2026

$ 57.56 USD

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Replacement Belt for Underdrive Pulley Kit (D560-0001). This belt drives the alternator and water pump.

Dinan Replacement Underdrive Pulley Belt For D560-0001 - Power Steeri...

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T#:21078443

Part#: D561-0005

Ships in 5 Business Days

Sale - Save 10% $ 63.99

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

$ 57.56 USD

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Sale - Save 10%

$ 63.99

This product was last offered at the strikethrough price on
07-31-2026

$ 57.56 USD

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Replacement Belt for Underdrive Pulley Kit (D560-0001). This belt attaches to the power steering and air conditioner.

BMW E9X M3 Replacement Belt For Underdrive Pulley Kit - (D560-0004) ...

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T#:586064

Part#: D561-0002

Ships in 5 Business Days

Sale - Save 10% $ 126.99

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

$ 114.26 USD

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Sale - Save 10%

$ 126.99

This product was last offered at the strikethrough price on
07-31-2026

$ 114.26 USD

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BMW E9X M3 Replacement Belt For Underdrive Pulley Kit - (D560-0004) is an essential component designed specifically for the Underdrive Pulley Kit. This belt is one of the two required for optimal performance of the kit.

Designed for Precision: Tailored to fit the BMW E9X M3 Underdrive Pulley Kit perfectly.
High-Quality Construction: Built to withstand the demands of high-performance driving.
Optimal Performance: Ensures smooth operation and reliable power delivery.
Easy Replacement: Simple to install, making maintenance straightforward.

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E9X M3 6/2008+ Dinan Underdrive Pulley Kit

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T#:389532

Part#: D560-0004

Ships in 5 Business Days

Sale - Save 10% $ 449.99

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

$ 404.96 USD

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Sale - Save 10%

$ 449.99

This product was last offered at the strikethrough price on
07-31-2026

$ 404.96 USD

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Replacement Belt For Underdrive Pulley Kit D560-0003 & D560-0004 ...

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T#:586065

Part#: D561-0007

Ships in 5 Business Days

Sale - Save 10% $ 95.99

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

$ 86.30 USD

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Sale - Save 10%

$ 95.99

This product was last offered at the strikethrough price on
07-31-2026

$ 86.30 USD

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

T#:928436

Part#: VAC-UPPS-M62-99

Ships in 8 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

T#:598754

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

Ships on Sep 1, 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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Replacement Belt For Underdrive Pulley Kit D560-0003

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T#:586063

Part#: D561-0003

Ships in 5 Business Days

Sale - Save 10% $ 63.99

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

$ 57.56 USD

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Qty

Sale - Save 10%

$ 63.99

This product was last offered at the strikethrough price on
07-31-2026

$ 57.56 USD

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