BMW Brake Master Cylinders for BMW 3 Series E92 (2007-2013)

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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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Pierburg Vacuum Pump
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Pierburg - Corporate Logo
T#:591846
Part#: 11667519458
Ships in 1-2 days
$ 278.98 USD
Free Shipping
$ 278.98 USD
Free Shipping
Restore pedal feel with a new brake vacuum pump
Vacuum Pump With Gasket For Brake Booster
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Pierburg - Corporate Logo
T#:594704
Part#: 11667619350
In Stock at Vendor
$ 406.99

This product was last offered at the strikethrough price on
05-04-2026

$ 394.99 USD
Free Shipping on orders $49 and up
$ 394.99 USD
Free Shipping on orders $49 and up
Replacement Vacuum Pump from Pierburg
TRW Brake Booster - E82/E84/E90 - 1-Series/ X1/ 3-Series
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
TRW - Corporate Logo
T#:23615518
Part#: 193321071863
Ships in 2 Business Days
$ 324.99 USD
Free Shipping on orders $49 and up
The brake booster in a car is essential for improving the efficiency of the braking system by amplifying the force exerted on the brake pedal. As time passes, the brake booster may undergo wear and tear, resulting in problems like reduced braking power, a soft or spongy brake pedal sensation, and potential brake fluid leaks. These issues pose a threat to the overall safety and performance of the vehicle. Consequently, replacing a worn or malfunctioning brake booster is crucial to maintaining optimal braking performance and ensuring the safety of the vehicle.
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OEM Pierburg Electric Brake Booster Vacuum Pump - E9X M3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Pierburg - Corporate Logo
T#:25142298
Part#: 7.02551.40.0
Special Order: No Guaranteed ETA
$ 192.99 USD
Free Shipping on orders $49 and up
If your brake booster fails, stopping your car is not going to be an easy task, and would be a rather dangerous situation. Replace your brake booster at the first sign of failure and restore braking performance.
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