Clutch Master Cylinder for BMW 5 Series E34 (1987-1995)

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The clutch master cylinder translates forces applied to the pedal down to the slave cylinder. No pressure in the pedal can be indicative of a failed master cylinder.
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ECS Billet Aluminum Clutch Master Cylinder Fitting - 21521151697 ...
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ECS - Corporate Logo
T#:36472759
Part#: 055182LA01-02
In Stock
Sale - Save 35% $ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 21.44 USD
Free Shipping on orders $49 and up
Sale - Save 35%
$ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 21.44 USD
Free Shipping on orders $49 and up

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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Genuine BMW Clutch Master Cylinder Reservoir - E23 733i, E23 735i, E3...
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Genuine BMW - Corporate Logo
T#:49080
Part#: 21521117729
In Stock
$ 27.58 USD
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Genuine BMW Expansion Tank
This item fits the following BMW Chassis:
E34 M5,E34

Clutch Master Cylinder - E34 E31
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Febi - Corporate Logo
T#:4656
Part#: 21521155425
In Stock at Vendor
$ 80.77

This product was last offered at the strikethrough price on
05-11-2026

$ 70.34 USD
Free Shipping on orders $49 and up
$ 70.34 USD
Free Shipping on orders $49 and up
Replace your leaking or worn clutch master cylinder with this replacement master cylinder.

This item fits the following BMWs:
1989-1995 E34 BMW 525i 530i 535i 540i
1990-1999 E31 BMW 850i 850ci 850csi
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LUK Clutch Master Cylinder - E31 E32 E34
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LUK - Corporate Logo
T#:596292
Part#: 21521155425
Back Ordered
$ 228.99 USD
Free Shipping
$ 228.99 USD
Free Shipping
Sometimes these units can wear and develop a squeak when depressed. This transfers fluid to the output cylinder in order to engage and disengage the clutch. Replace yours and remove that squeaky piston.
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Master Cylinder
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FTE - Corporate Logo
T#:594647
Part#: 21521155425
In Stock
$ 147.73 USD
Free Shipping
$ 147.73 USD
Free Shipping
FTE Master Cylinder - E34
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FTE - Corporate Logo
T#:379567
Part#: 21522226477
Ships in 1-2 days
$ 217.71 USD
Free Shipping on orders $49 and up
OEM replacement master cylinder

Genuine BMW Clutch Master Cylinder Repair Kit
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Genuine BMW - Corporate Logo
T#:21751
Part#: 21521159332
Ships in 6 Business Days
9% off MSRP $ 74.99

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

$ 67.99 USD
Free Shipping on orders $49 and up
9% off MSRP
$ 74.99

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

$ 67.99 USD
Free Shipping on orders $49 and up


Genuine BMW Repair Kit Output Cylinder Clutch
This item fits the following BMW Chassis:
E36 M3,E46 M3,E34,E36,E46

Genuine BMW Master Cylinder
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Genuine BMW - Corporate Logo
T#:367984
Part#: 21521155425
Ships in 9 Business Days
6% off MSRP $ 365.99

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

$ 342.99 USD
Free Shipping on orders $49 and up
6% off MSRP
$ 365.99

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

$ 342.99 USD
Free Shipping on orders $49 and up

Genuine BMW Clutch Master Cylinder Rebuild Kit
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Genuine BMW - Corporate Logo
T#:7550
Part#: 21521158144
Ships in 9 Business Days
9% off MSRP $ 115.99

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

$ 105.99 USD
Free Shipping on orders $49 and up
9% off MSRP
$ 115.99

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

$ 105.99 USD
Free Shipping on orders $49 and up


Genuine BMW Repair Kit Input Cylinder Clutch - Fag
This item fits the following BMW Chassis:
E34 M5,E34


FTE Clutch Master Cylinder Repair Kit - E34, E36, E46, Z3
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FTE - Corporate Logo
T#:377015
Part#: 21521159332
Back Ordered
$ 47.99 USD
Free Shipping on orders $49 and up
Includes all internal master cylinder parts