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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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Rein Water Pump Pulley - E34, E36, E39, Z3
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591716
Part#: 11511730554
In Stock
$ 49.99 USD
Free Shipping on orders $49 and up
$ 49.99 USD
Free Shipping on orders $49 and up
Located behind the fan blade, fan clutch bolts to this pulley
Rein Water Pump Pulley - E39, E46, E53, E60, E83, Z3, Z4
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591711
Part#: 11511436590
In Stock
$ 50.99 USD
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$ 50.99 USD
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A common failing piece due to the plastic design.
Alta Performance - Corporate Logo
T#:26238480
Part#: AMPENG520
In Stock at Vendor
$ 129.99 USD
Free Shipping on orders $49 and up

Enhance the performance of your Mini with the ALTA Lightened Crank Pulley (LCP), engineered to increase horsepower and torque. Available in 0% Stock Sized and +2% Oversized options, this pulley is crafted from 6061T6 aluminum, weighing only 0.65 lbs. Significantly lighter than the stock crank pulley, the ALTA LCP ensures improved engine efficiency without adding vibration or noise. The +2% Oversized pulley provides additional boost for Supercharged Cooper S models, delivering safe and reliable performance. With increased belt contact, this pulley reduces wear and enhances durability, making it a must-have upgrade for Mini enthusiasts.

  • Increases horsepower and torque
  • Lightweight 6061T6 aluminum construction
  • Available in 0% Stock Sized and +2% Oversized options
  • Does not affect charging system
  • Improves engine efficiency and performance
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Crank Pulley With Dampener
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:38587673
Part#: 11237829906
Ships in 3 Business Days
$ 89.99 USD
Free Shipping on orders $49 and up

Rein Power Steering Pulley E88 135i, E90 335i/335xi, E84 X1 35i xDriv...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:34147755
Part#: 32427582947
In Stock at Vendor
$ 71.99 USD
Free Shipping on orders $49 and up

Power Steering Pulley is a vital component in your BMW’s power steering system, designed to maintain smooth and responsive steering performance. Available from Turner Motorsport, this high-quality pulley ensures the efficient operation of your power steering pump by providing optimal belt tension and reducing wear. Built to OEM specifications, the Power Steering Pulley is a direct-fit replacement, making installation easy and hassle-free for BMW owners and mechanics alike.

Made from durable materials, this pulley is designed to withstand the rigors of daily driving, offering long-lasting performance and reliability. It’s the perfect solution for those looking to restore or maintain the functionality of their BMW’s power steering system.

Key Benefits:

  • Ensures smooth and efficient power steering operation
  • Direct OEM fit for easy installation
  • Reduces wear on the power steering belt and pump
  • Made from durable materials for long-lasting performance
  • Available from Turner Motorsport, a trusted source for BMW parts

This Power Steering Pulley is an essential part for maintaining the functionality and reliability of your BMW’s power steering system.

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Vibration Damper
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:38161721
Part#: 11237513862
Ships in 3 Business Days
$ 92.99 USD
Free Shipping on orders $49 and up

Torx Screw - Priced Each
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:400830
Part#: 11287530315
In Stock
$ 7.92 USD
Free Shipping on orders $49 and up
Used to mount the drive belt tensioner to the engine block.
Rein - Corporate Logo
T#:53750207
Part#: PKP0124
Back Ordered
New Item
$ 41.99 USD
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$ 41.99 USD
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Upgrade the Plastic Pulley in Your BMW with an All Aluminum Construction Replacement from Rein

Alta Performance - Corporate Logo
T#:27938418
Part#: AMPENG195BK
In Stock at Vendor
$ 99.99 USD
Free Shipping on orders $49 and up

MINI R52 R53 Adjustable Tensioner Stop - Black

Upgrade your Mini's engine with the MINI R52 R53 Adjustable Tensioner Stop - Black. Engineered for precision and durability, this tensioner stop allows for easy adjustment of belt tension, ensuring optimal performance. Say goodbye to belt slippage and enjoy improved engine reliability with this high-quality accessory.

  • Allows for easy adjustment of belt tension
  • Prevents belt slippage for improved engine reliability
  • Engineered for precision and durability
  • Enhances performance of your Mini's engine
  • Sleek black design adds a stylish touch
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Rein - Corporate Logo
T#:53750169
Part#: PKP0121
Ships in 3 Business Days
New Item
$ 63.99 USD
Free Shipping on orders $49 and up
Upgrade the Plastic Pulley in Your BMW with an All Aluminum Construction Replacement from Rein
Rein - Corporate Logo
T#:53750204
Part#: PKP0123
Ships in 3 Business Days
New Item
$ 61.99 USD
Free Shipping on orders $49 and up
$ 61.99 USD
Free Shipping on orders $49 and up
Upgrade the Plastic Pulley in Your BMW with an All Aluminum Construction Replacement from Rein
Vibration Damper
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:38195378
Part#: 11231438995
Ships in 3 Business Days
$ 112.99 USD
Free Shipping on orders $49 and up


OEM Rein PRO Series Water Pump & Serpentine Belt Kit - BMW E60 535 N5...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:38161726
Part#: RSW0021
Ships in 3 Business Days
$ 711.23 USD
Free Shipping on orders $49 and up
Includes a new electric water pump, serpentine belt, belt tensioners, and idler pulleys
Genuine BMW Motorsport - Corporate Logo
T#:396369
Part#: 12311311449KT
Ships on Sep 17, 2026
$ 1,696.99 USD
Free Shipping on orders $49 and up

Group A racecars were the top of their class in both touring car and rally racing. Heavily modified and extremely fast these cars set out to demonstrate the best of what a manufacturer could do on the racetrack. It was the predecessor to the current DTM class racing and set a standard for many other divisions of motorsport to follow.  

One of the weaker points of the S14 engine, when speaking from a racing standpoint is the belt drive system. While fine for a street going car, a V-belt is not suitable for high RPM applications. On the track, most of your time will be spent in the higher rev range which puts extreme amounts of stress on the factory setup. BMW realised this and came up with a solution that involved doing away with the V belt system and using a 6 rib serpentine style instead.

Extremely resistant to slippage and failure this design holds up much better the abuse of track duty and won't leave you stranded and waiting for tow back to the pit. Additionally, this kit does not accommodate and a/c compressor and the alternator and waterpump are underdriven by way of slightly larger pulleys. Combined, this puts less of a load on the crankshaft which leads to more efficient power delivery to the ground. If you track you E30 M3, this is an essential upgrade and until now was extremely difficult to source. Do not skip this pivotal step in your engine build or overhaul and get a leg up on the competition the Group A way.
Please note this kit is special order and in non-returnable

Features:

  • Kit replaces all engine pulleys and crank damper
  • Includes 6 rib serpentine belt
  • Underdriven waterpump and alternator pulleys
  • Recommended for off road and racing use only 

This kit fits the following BMWs:
1986-1992 BMW M3 All 
 

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Vaico - Corporate Logo
T#:50346424
Part#: 11288580360
Special Order: No Guaranteed ETA
New Item
$ 68.99 USD
Free Shipping on orders $49 and up
$ 68.99 USD
Free Shipping on orders $49 and up
Accessory belt tensioners provide tension to the belt drive system, ensuring the belt is able to properly turn engine accessories without slipping. If your tensioner has failed, replace it with a brand-new unit to ensure proper water pump and alternator functionality.
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Rein - Corporate Logo
T#:45997481
Part#: PKP0246
Ships in 3 Business Days
$ 64.99 USD
Free Shipping on orders $49 and up
Plastic power steering pump pulleys can wear over time or even crack. If you are replacing your pump or if your pulley has worn or failed, upgrade to this aluminum pulley from OEM Rein.