BMW Brake Master Cylinders for BMW X Series E70 (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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Brake Booster Vacuum Pump - E53, E60, E63, E64, E65, E66, E70
Brake Booster Vacuum Pump - E53, E60, E63, E64, E65, E66, E70 ...
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:22558979
Part#: 11667635657
In Stock
Sale - Save 50% $ 112.99

This product was last offered at the strikethrough price on
05-03-2026

$ 56.50 USD
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Sale - Save 50%
$ 112.99

This product was last offered at the strikethrough price on
05-03-2026

$ 56.50 USD
Free Shipping on orders $49 and up
Add to Wish List
Found at the front of the cylinder head, this auxiliary pump sends vacuum to the brake booster to provide assistance to your braking system. A failure could lead to harder pedal feel and increased travel, as well as a vacuum leak.
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Brake Booster - E70/E71 X5/X6
Brake Booster - E70/E71 X5/X6
TRW - Corporate Logo
T#:23615509
Part#: 193321071856
Back Ordered
$ 392.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 392.99 USD
Free Shipping on orders $49 and up
Add to Wish List
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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