BMW Drivetrain Parts for BMW E21 320i M10 1.8L

Clear BMW chassis

Please ensure your correct model is selected

Building your perfect BMW is more than just adding horsepower and stiff suspension. Your drivetrain needs attention in order to deliver power effectively. Most BMWs feature comfortable clutch discs, heavy flywheels, long shifter throws, and open differentials. The drivetrain transmits power to the wheels, but can also be a source of power loss when it is designed for comfort rather than performance. Everything on this page will help you improve your power delivery and driving experience by providing custom Limited Slip Differentials, Short Shift Conversions, Performance Clutch Discs, Lightweight Flywheels, and anything else your BMW needs to be the perfect driving experience.

Sub-Categories

Sort By:

Throw Out Bearing (Sachs) for Most BMWs (see list)
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Sachs - Corporate Logo
T#:371823
Part#: 21517521471
In Stock
$ 50.99 USD
Free Shipping on orders $49 and up
Standard Throwout Bearing. Works with stock clutch/pressure plate or HD setup. Note: When you buy a standard clutch kit from us, it includes the throw-out bearing. This part is also known by a few other part#'s, including BMW Part# 21 51 1 223 366 (21511223366), BMW Part# 21 51 2 226 729 (21512226729), and Sachs part# 3151231031.

This throw out bearing fits most BMWs including:
1975-1983  E21 3 Series  - all including 320i, 323i
1975-1989  E24 6 series  including 630csi, 633csi, 635csi & E24 M6
1982-1988  E28 5 Series  (all) including 528e, 533i, 535i & E28 M5
1984-1991  E30 3 series  (all) including 318i, 318is, 325, 325e, 325es, 325i, 325is, 325ix & E30 M3
1988-1994  E32 7 Series  6 cylinder (735i, 735iL)
1989-1995  E34 5 Series  6 cylinder (525i & 535i)
1992-1999  E36 3 Series  (all) including 318i, 318is, 318ti, 325i, 325is, 323is, 328i, 328is, and E36 M3
1997-2003  E39 5 Series  6 cylinder, including 528i, 525i & 530i
1999-2005  E46 3 Series  with 5 speed, including 323i, 323Ci, 325i, 325xi, 325Ci, 328i, 328Ci, 330i, 330Ci & 330xi (**no ZHP 6 speed)
2000-2006  X5  6 cylinder / X5 3.0
1996-2002  Z3 Roadster/Coupe  including Z3 1.9, 2.3, 2.5, 2.8 and 3.0
Show More Show Less
Clutch Release Bearing
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Sachs - Corporate Logo
T#:28803208
Part#: 21511204525
In Stock
$ 101.99

This product was last offered at the strikethrough price on
03-17-2026

$ 63.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 101.99

This product was last offered at the strikethrough price on
03-17-2026

$ 63.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
E9 - E34 Powerflex Clutch Fork Pivot Pin - PFF5-370
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:22064629
Part#: PFF5-370
Back Ordered
$ 29.99 USD
Free Shipping on orders $49 and up
When it comes to optimizing your BMW's performance and ensuring its longevity, the Powerflex Clutch Fork Pivot Pin stands out as a crucial aftermarket enhancement that should not be underestimated. This top-tier automotive component offers a host of advantages that can significantly enhance your driving experience and preserve the condition of your cherished BMW. Enhanced Clutch Performance: The Powerflex Clutch Fork Pivot Pin is meticulously engineered to provide smoother and more precise clutch engagement. This translates into a more responsive and seamless shifting experience, granting you greater control while driving. Prolonged Clutch Lifespan: By optimizing clutch operation, this aftermarket pin reduces unnecessary wear and tear on your clutch components. This not only extends the life of your clutch system but also helps you avoid costly clutch replacements and maintenance in the future. Refined Shifting Experience: A well-maintained clutch fork pivot pin ensures more consistent and precise gear shifts. This leads to smoother and more efficient gear changes, resulting in an overall improvement in your driving experience. Built to Last: Crafted from premium materials, the Powerflex Clutch Fork Pivot Pin is designed to endure the demands of everyday driving. Its durability guarantees long-lasting performance, even in challenging conditions. Cost-Effective Enhancement: Upgrading your BMW with the Powerflex Clutch Fork Pivot Pin is a cost-effective way to optimize your clutch system. It offers substantial improvements without the need for a complete clutch replacement, saving you both time and money. Compatibility Across BMW Models: The Powerflex Clutch Fork Pivot Pin is designed to fit a wide range of BMW models, ensuring it is compatible with your specific vehicle. OE / OEM Cross Reference Numbers: 21518607922 Fits these BMW models: 3 Series E21 320i/323i (1975-1977) E21 320i/323i (1978-1983) E30 3 Series (1984-1991) 5 Series E28 5 Series (1982-1988) E34 5 Series (1989-1995) 6 Series E24 6 Series (1979-1989) 7 Series E32 7 Series (1988-1994) Z Series Z1 (1988-1991)
Show More Show Less

Sachs Clutch Kit - E21, E30
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Sachs - Corporate Logo
T#:378351
Part#: 21211223572
Ships in 1 day
$ 281.78 USD
Free Shipping
$ 281.78 USD
Free Shipping
Includes clutch disk, pressure plate and clutch release bearing

BMW E21 Rear Diff Mounting Bushing
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:54352781
Part#: PFR5-1625H
Ships in 1 Business Day
New Item
$ 89.99 USD
$ 89.99 USD
Powerflex Performance Polyurethane Differential Bushing - E21 320i ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:554702
Part#: PFR5-1625X2
Ships in 1 Business Day
$ 89.99 USD
Free Shipping
$ 89.99 USD
Free Shipping

Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Powerflex Black Series bushings are the ultimate in track and race bushings. Featuring 95A durometer polyurethane, Black Series bushings are 25% stiffer than street bushings. Engineered to perform, Powerflex performance polyurethane control arm bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

Show More Show Less