BMW Drivetrain Parts for BMW E30 M3 S14 2.3L

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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.

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ECS - Corporate Logo
T#:366828
Part#: 009314ECS01A
In Stock
Sale - Save 25% $ 62.99

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

$ 47.24 USD
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Sale - Save 25%
$ 62.99

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

$ 47.24 USD
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You use a magnetic drain plug for your engine oil, right? Why not apply the same proactive thinking to the differential too? This is a direct replacement magnetic differential drain plug for your BMW. It will catch and retain fine and larger metal particles in your diff oil. If you're proactive in your diff oil servicing, you will catch a minor issue long before it becomes a headache. Diff drain plug includes one sealing o-ring. Direct replacement for Genuine BMW part number(s): 33117525064, 33110308370, 33110152626
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ECS - Corporate Logo
T#:36472759
Part#: 055182LA01-02
In Stock
Sale - Save 25% $ 33.99

This product was last offered at the strikethrough price on
06-14-2026

$ 25.49 USD
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Sale - Save 25%
$ 33.99

This product was last offered at the strikethrough price on
06-14-2026

$ 25.49 USD
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The ECS Billet Master Cylinder Fitting is the ultimate solution for a notorious failure point in BMW E30 clutch systems. This critical fitting, located at the end of the master cylinder reservoir hose, is responsible for delivering hydraulic fluid to the clutch master cylinder inlet. Unfortunately, the OEM plastic fitting is prone to degradation after prolonged exposure to brake fluid, often leading to total hydraulic pressure loss and brake fluid leaks inside your vehicle.

ECS has addressed this issue by engineering a robust and long-lasting alternative. Crafted from 6061 billet aluminum and finished with black hard-coat anodizing for superior corrosion resistance, this precision-machined fitting replaces the fragile plastic original, ensuring leak-free performance for the lifetime of your vehicle. Upgrade to our Billet Master Cylinder Fitting during your next clutch master cylinder service and enjoy peace of mind knowing your BMW is equipped with a durable, high-quality solution.

Features & Benefits:

Made from 6061 billet aluminum for a permanent, reliable upgrade over the factory plastic fitting. Black hard-coat anodized finish ensures long-lasting protection against the elements. Precision-machined barbs match OEM dimensions for a leak-free seal with Genuine and aftermarket master cylinders. Designed for a secure fit within the factory grommet location. Prevents brake fluid leaks and loss of clutch hydraulic pressure caused by plastic fitting failure. Upgrade your BMW and bulletproof your master cylinder with the ECS Billet Aluminum Master Cylinder Fitting. Ensure clutch hydraulic system reliability and enjoy peace of mind knowing your failure-prone plastic master cylinder fitting has been addressed.

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E24 M6, E28 M5, E30 Exact-Fit Stainless Steel Clutch Line
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:386439
Part#: 017877ECS01A
In Stock
Sale - Save 20% $ 63.99

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

$ 51.19 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 63.99

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

$ 51.19 USD
Free Shipping on orders $49 and up

This braided stainless steel line replaces the stock hydraulic hose connecting your clutch slave cylinder to the clutch master cylinder. There are several deficiences with rubber, especially as it ages - when new the rubber expands and swells under pressure and the pedal can feel spongy. As rubber ages and is exposed to extreme temperatures the rubber can harden and even shrink (common on brake hoses), which results in a stiff pedal. Rubber clutch lines do not stand up to the stresses of hard use. ECS Exact-Fit stainless reinforced clutch lines provide more confident and dependable shifting by maintaining consistent line pressure, long lasting corrosion resistance, and increased protection from failure. These lines are reinforced with braided stainless steel mesh, affording superior expansion resistance. This resistance to expansion creates a firmer pedal, and a more direct clutch pedal feel. The signature red polymer coating provides additional protection from the elements and abrasion.

This particular stainless steel clutch line fits the following BMWs:
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
1988 E28 BMW M5
1987-1989 E24 BMW M6 

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ECS Heavy Duty Differential Bushing - E30, 318ti, Z3
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:30662812
Part#: 055059LA01
In Stock
Sale - Save 56% $ 52.99

This product was last offered at the strikethrough price on
04-28-2026

$ 23.24 USD
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Sale - Save 56%
$ 52.99

This product was last offered at the strikethrough price on
04-28-2026

$ 23.24 USD
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As your E30 ages, the rear differential bushing can crack, dry rot, and split. It's time for an upgrade. The ECS Tuning Heavy Duty Differential Bushing is crafted with performance in mind. Instead of using polyurethane, which is known for increasing NVH, the enthusiasts at ECS chose HD 70D rubber. This material offers a close-to-factory feel without the excess deflection of softer bushings, ensuring a pleasurable driving experience free from differential whine and excess movement.

Features & Benefits:

Eliminates Weak OEM Mount: The aging E30 chassis deserves an upgrade. Replace your old, cracked, and worn factory bushing with this HD alternative for improved performance. Perfect for Street or Track: Constructed from HD rubber instead of polyurethane or Delrin, this bushing provides comfort for daily driving while remaining effective in performance applications. Added Responsiveness: The 70D HD rubber compound is stiffer than the stock material, reducing drivetrain movement and effectively locking down your rear differential. Easy Installation: Precision-manufactured to the exact specifications of your OEM differential bushing, the ECS heavy-duty replacement installs just like the factory component. Whether you are replacing an aging factory bushing, removing excess driveline movement, or balancing performance and comfort, ECS Tuning has you covered with their Heavy Duty Rear Differential Bushing.

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ECS - Corporate Logo
T#:384201
Part#: 121980ECS01KT
In Stock
Sale - Save 25% $ 36.99

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

$ 27.74 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 36.99

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

$ 27.74 USD
Free Shipping on orders $49 and up

Some modifications to your vehicle may not produce power to create gains in the overall performance of your driving. When you add a "Po' Boy" clutch stop to your BMW the performance gain is directly felt in the driving experience.

The ECS clutch stop allows the driver to fine tune the position of the clutch pedal to closely match the engagement point for precise, quicker shifting. The adjustment range found in this product can be set to the stock engagement point or can be adjusted to follow the wear of the clutch.  Meaning your new experience will never change all the way to the end of the clutch life and can be reset to enjoy the next clutch.

Note: This modification might require some slight modification to the clutch switch mounting bracket, which can be bent slightly by hand.

 

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Genuine BMW - Corporate Logo
T#:25239
Part#: 35311154737
Ships in 2 Business Days
Sale - Save 8% $ 143.99

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

$ 132.49 USD
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Sale - Save 8%
$ 143.99

This product was last offered at the strikethrough price on
08-10-2026

$ 132.49 USD
Free Shipping on orders $49 and up
Replace your sloppy and squeaky clutch pedal with this Genuine BMW clutch pedal.

This item fits the following BMWs:
1984-1985 E30 BMW 318i
1984-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix M3
1982-1988 E28 BMW 528e 533i 535i 535is M5
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Genuine BMW - Corporate Logo
T#:181126
Part#: 23121205342
In Stock
Sale - Save 9% $ 29.99

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

$ 27.15 USD
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Sale - Save 9%
$ 29.99

This product was last offered at the strikethrough price on
08-26-2026

$ 27.15 USD
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Genuine BMW Shaft Seal - 40X55X8
This item fits the following BMW Chassis:
E30 M3,E34 M5,E30,E34

Genuine BMW - Corporate Logo
T#:7625
Part#: 25111221201
In Stock
Sale - Save 8% $ 166.99

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

$ 154.02 USD
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$ 166.99

This product was last offered at the strikethrough price on
08-26-2026

$ 154.02 USD
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This is the aluminum shift arm that supports the shift lever for E30 325i and M3. Bushings sold separately.

This item fits the following BMWs:
1984-1991 E30 BMW 325i 325ic 325is M3
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Genuine BMW - Corporate Logo
T#:394453
Part#: 33112228336
In Stock
Sale - Save 8% $ 598.99

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

$ 553.47 USD
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$ 598.99

This product was last offered at the strikethrough price on
08-25-2026

$ 553.47 USD
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An OE replacement for your leaking or damaged rear differential cover.

Fits the following BMW's:
E36 BMW Z3  S54 & S52


Genuine BMW - Corporate Logo
T#:15698
Part#: 33412225510
In Stock
Sale - Save 8% $ 269.99

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

$ 249.74 USD
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Sale - Save 8%
$ 269.99

This product was last offered at the strikethrough price on
08-26-2026

$ 249.74 USD
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Genuine BMW Drive Flange
This item fits the following BMW Chassis:
E30 M3,E30

Genuine BMW - Corporate Logo
T#:35506
Part#: 11431311677
In Stock
Sale - Save 10% $ 209.99

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

$ 188.15 USD
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Sale - Save 10%
$ 209.99

This product was last offered at the strikethrough price on
08-26-2026

$ 188.15 USD
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Genuine BMW Guide Tube - L=269mm
This item fits the following BMW Chassis:
E30 M3,E30

Fits BMW Engines including:
S14

Genuine BMW - Corporate Logo
T#:360886
Part#: 33416762317
In Stock
Sale - Save 8% $ 124.99

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

$ 115.22 USD
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Sale - Save 8%
$ 124.99

This product was last offered at the strikethrough price on
08-26-2026

$ 115.22 USD
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Genuine BMW - Corporate Logo
T#:368008
Part#: 24111217082
In Stock
Sale - Save 7% $ 55.99

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

$ 51.99 USD
Limited Qty Sale
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Sale - Save 7%
$ 55.99

This product was last offered at the strikethrough price on
05-25-2026

$ 51.99 USD
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Genuine BMW - Corporate Logo
T#:337968
Part#: 11221312519
Ships on Feb 22, 2027
Sale - Save 17% $ 1,013.99

This product was last offered at the strikethrough price on
05-07-2026

Starting at $ 837.91 USD
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$ 1,013.99

This product was last offered at the strikethrough price on
05-07-2026

Starting at $ 837.91 USD
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This Genuine BMW Motorsport part (used on the Sport Evo M3s) is a precision machined and balanced lightweight steel flywheel. The stock flywheel weights 19.5 lbs, the Motorsport flywheel is under 12 lbs! This lightweight flywheel will allow the motor to "spool up" faster, improving acceleration. This is a perfect flywheel upgrade for someone who does not want a full aluminum lightweight flywheel and also wants factory Motorsport parts on the E30 M3. After the Turner performance chip this is the next biggest "bang for the buck" for your M3. Flywheel mounting bolts available separately.

This item fits the following BMWs:
1987-1991 E30 BMW M3
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Genuine BMW - Corporate Logo
T#:7616
Part#: 25111207744
In Stock
Sale - Save 17% $ 7.99

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

$ 6.64 USD
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Sale - Save 17%
$ 7.99

This product was last offered at the strikethrough price on
08-26-2026

$ 6.64 USD
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Replace your damaged shifter cup to ensure smooth shifter operation.


Genuine BMW Ball Cup Lower -
This item fits the following BMW Chassis:
E30