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BMW E30 M3 Brake Master Cylinders

BMW E30 M3 Brake Master Cylinders The brake master cylinder is responsible for distributing fluid from the reservoir to the front and rear brake systems. The fluid reservoir actually sits on top of the master cylinder with hard metal brake lines running out of it. There are a few places where the master cylinder can leak and cause a spongy or soft brake pedal. The inside has several pistons with o-rings and seals that can fail and allow brake fluid to escape. Likewise, the external metal lines also have o-rings where fluid can seep out or let air/moisture in.
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Brake Master Cylinder - E30 M3 This is an OEM replacement brake master cylinder for the E30 M3, 1987-1991.
Genuine BMW
Part #: 34312225505
Price: $828.17 (USD) 
$1028.36 (19% off MSRP)
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Brake Pressure Regulator - E30 This Genuine BMW brake pressure regulator helps control the front to rear brake balance on E30 3 series. It is mounted near the brake master cylinder.

This item fits the following BMWs:
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
Genuine BMW
Part #: 34331152494
Price: $124.65 (USD) 
$138.72 (10% off MSRP)
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Brake Master Cylinder Upgrade - E30 325e, 325i, M3 This is the 25mm master cylinder upgrade for E30 3 series. It features the larger master cylinder from the E32 750il (#34311156643) with the new required brake line (#34326755585). This set up is used on many track driven E30's to allow for extra stopping power.

This item fits the following BMWs:
1984-1991 E30 BMW 325e 325es 325i 325ic 325is M3
Turner Motorsport
Part #: TMS14298
Price: $226.90 (USD) 
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Brake Master Cylinder  - E32 735i 750il, E30 Upgrade This is the OEM brake master cylinder for E32 750il made by ATE. This master cylinder can be used as an upgrade for E30 models (in conjunction with brake line #34326755585).

This item fits the following BMWs:
1987-3/1988 E32 BMW 735i 735il
1988-1994 E32 BMW 750il

Brake Master Cylinder Upgrade
1984-1991 E30 BMW 325e 325es 325i 325ic 325is M3
ATE
Part #: 34311156643
Price: $202.95 (USD) 
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Chase Bays Brake Booster Eliminator - E30 E28 E24 E21

Gain more constant braking feel and modulation by eliminating your brake booster. With this kit your brakes will function like factory below threshold braking, but above threshold braking, while requiring more effort, this give you better modulation of the brakes giving you total control and the right amount of braking for what you need. 

*Please note this kit will not work with factory lines and requires one of brake line relocation kits also*

 

 

 

Chase Bays
Part #: CB-EURO-BBE
Price: $199.99 (USD) 
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