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ATE BMW Brake Master Cylinders for BMW Z Series E85/6 (2003-2008)

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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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ATE Brake Master Cylinder - E46, Z4

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T#:374237

Part#: 34336785666

In Stock at Vendor

$ 313.44 USD

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$ 313.44 USD

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Direct replacement master cylinder

Brake Booster

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T#:594506

Part#: 34336779681

In Stock at Vendor

$ 297.96 USD

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$ 297.96 USD

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ATE Master Cylinder Reservoir Grommet

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T#:375679

Part#: 34311160133

In Stock

$ 4.99

This product was last offered at the strikethrough price on
05-28-2026

$ 3.99 USD

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$ 3.99 USD

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Secures the reservoir to the master cylinder

ATE Check Valve Gasket - E46, E82, E88, E90, E91, E92, E93, Z3, Z4 ...

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T#:8105

Part#: 34336765316

In Stock

$ 3.99

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

$ 2.99 USD

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$ 2.99 USD

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BMW BRAKES GASKET 34336765316

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