BMW E34 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 - E34 525i 535i M5, E32 735i/il
TRW
T#: 13585
Mfg#: 34331156978
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Brake Check Valve - E30 325i 325is 325ix, E34 525i
Genuine BMW
T#: 8101
Mfg#: 34331158113
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$84.33 14% off MSRP
$72.50
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Chase Bays Brake Booster Eliminator - E30 E28 E24 E21
Chase Bays
T#: 400150
Mfg#: CB-EURO-BBE
Direct Ship
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$199.99
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