Find Parts That Fit Your Vehicle

Crankshaft Pulleys & Harmonic Balancers

Keep your drive belt system in check by replacing your BMW's crankshaft pulleys and harmonic balancers.
Sort By:

Genuine BMW - Corporate Logo
T#:32404
Part#: 11211439395
In Stock
4% off MSRP $ 26.99

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

$ 25.99 USD
Free Shipping on orders $49 and up
4% off MSRP
$ 26.99

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

$ 25.99 USD
Free Shipping on orders $49 and up


Genuine BMW Hex Bolt
This item fits the following BMW Chassis:
E82 1M Coupe,E70 X5,E71 X6,E82,E83 X3,E85 Z4,E86 Z4,E89 Z4,E90,E92,E93,F01,F02,F10,F25 X3

Fits BMW Engines including:
N51,N52,N52N,N54,N54T

Show More Show Less
Dinan - Corporate Logo
T#:21078436
Part#: D560-0001
Ships in 6 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
Free Shipping on orders $49 and up
Sale - Save 10%
$ 449.99

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

$ 404.96 USD
Free Shipping on orders $49 and up
Dinan's lightweight billet aluminum crankshaft pulley underdrives each of the accessories by 13 percent, reducing parasitic drag on the engine for a 6 HP @ 8000 RPM and 4 lb-ft torque @ 8000 RPM gain on a stock vehicle. The Dinan underdrive pulley retains the factory harmonic crankshaft damper, eliminating vibration that might otherwise damage the crankshaft. The kit includes all of the necessary mounting hardware, a lightweight pulley, and shorter belts. This product is backed by our industry-leading 4 year/50,000 mile warranty so you can rest assured that you are purchasing the best quality product for your BMW. Features: All accessories are underdriven by 13% to decrease drag on the engine. Lightweight billet aluminum crankshaft pulley, black anodized and engraved. Includes mounting hardware and shorter belts.
Show More Show Less
Genuine BMW - Corporate Logo
T#:32875
Part#: 11231741773
Ships in 10 Business Days
2% off MSRP $ 905.99

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

$ 887.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 905.99

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

$ 887.99 USD
Free Shipping on orders $49 and up


Genuine BMW Vibration Damper -
This item fits the following BMW Chassis:
E38,E39,E53 X5

Fits BMW Engines including:
M62


Genuine BMW - Corporate Logo
T#:32873
Part#: 11231738620
Special Order: No Guaranteed ETA
2% off MSRP $ 826.99

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

$ 810.00 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 826.99

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

$ 810.00 USD
Free Shipping on orders $49 and up


Genuine BMW Vibration Damper
This item fits the following BMW Chassis:
E36 M3,E34,E36,E39

Fits BMW Engines including:
M50,M52,S50,S52


Genuine BMW - Corporate Logo
T#:25064
Part#: 11231402618
Ships in 3 Business Days
$ 17.45 USD
Free Shipping on orders $49 and up


Genuine BMW Torx Bolt - M12 X130
This item fits the following BMW Chassis:
E39 M5,E39

Fits BMW Engines including:
M62,S62

Genuine BMW - Corporate Logo
T#:51602367
Part#: 11238638446KT
Ships in 1-2 days
New Item
$ 810.99 USD
Free Shipping on orders $49 and up
$ 810.99 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less

Genuine BMW - Corporate Logo
T#:51602353
Part#: 11239845162KT
Ships in 1-2 days
New Item
$ 970.99 USD
Free Shipping on orders $49 and up
$ 970.99 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less
Genuine BMW - Corporate Logo
T#:51813328
Part#: 11235A3CF02KT
Ships in 3 Business Days
New Item
$ 798.99 USD
Free Shipping on orders $49 and up
$ 798.99 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less

Genuine BMW - Corporate Logo
T#:635924
Part#: 11239845162
Ships in 1-2 days
8% off MSRP $ 978.99

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

$ 895.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 978.99

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

$ 895.99 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less

Genuine BMW - Corporate Logo
T#:50888347
Part#: 11235A3CF02
Ships in 1-2 days
New Item
8% off MSRP $ 782.99

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

$ 716.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 782.99

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

$ 716.99 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less
Genuine BMW - Corporate Logo
T#:51426490
Part#: 11239846660KT
Back Ordered
New Item
$ 933.00

This product was last offered at the strikethrough price on
03-10-2026

$ 849.99 USD
Free Shipping on orders $49 and up
$ 849.99 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less
Genuine BMW - Corporate Logo
T#:51813329
Part#: 11239453608KT
Ships in 5 Business Days
New Item
$ 977.99 USD
Free Shipping on orders $49 and up
$ 977.99 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less


Genuine BMW - Corporate Logo
T#:50822333
Part#: 11239453608
Ships in 5 Business Days
New Item
8% off MSRP $ 978.99

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

$ 895.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 978.99

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

$ 895.99 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less
Genuine BMW - Corporate Logo
T#:635925
Part#: 11239846660
Back Ordered
21% off MSRP $ 978.17

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

$ 774.57 USD
Free Shipping on orders $49 and up
21% off MSRP
$ 978.17

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

$ 774.57 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less
Genuine BMW - Corporate Logo
T#:19175
Part#: 11237513862
Ships in 8 Business Days
2% off MSRP $ 719.99

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

$ 705.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 719.99

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

$ 705.99 USD
Free Shipping on orders $49 and up


Genuine BMW Vibration Damper -
This item fits the following BMW Chassis:
E39,E46,E53 X5,E83 X3,E85

Fits BMW Engines including:
M54,M56


Genuine BMW - Corporate Logo
T#:51848531
Part#: 11238053287KT
Ships in 8 Business Days
New Item
$ 1,053.57 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less

Genuine BMW - Corporate Logo
T#:635920
Part#: 11238053287
Ships in 8 Business Days
8% off MSRP $ 1,039.99

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

$ 951.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 1,039.99

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

$ 951.99 USD
Free Shipping on orders $49 and up
Harmonic balancers protect your engine from vibrations caused by the combustion process. If your balancer is showing signs of failure and your engine is vibrating excessively, it is best to replace this as soon as possible to prevent damage to the crankshaft and internal engine components.
Show More Show Less
Genuine BMW Motorsport - Corporate Logo
T#:396369
Part#: 12311311449KT
Ships on Sep 16, 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 
 

Show More Show Less