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ATE BMW Brake Master Cylinders for BMW 5 Series E28 (1982-1988)

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 - E28 528e 535i M5, E24 633csi 635csi M6 ...

T#:8084

Part#: 34311155270

In Stock at Vendor

$ 423.81

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

$ 375.35 USD

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$ 375.35 USD

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This is an OEM replacement brake master cylinder that fits many E28 5 series and E24 6 series. If your original BMW brake master cylinder has failed, this is the high quality replacement you need.

only for cars with ABS

This item fits the following BMWs:
1982-1988 E28 BMW 524td 528e 535i 535is M5
1983-1989 E24 BMW 633csi 635csi M6

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