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URO BMW 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
Brake Master Cylinder
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373215
Part#: 34311165544
Ships in 1 Business Day
$ 106.99

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

$ 88.99 USD
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$ 88.99 USD
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Make sure your pedal force is actually making it to the calipers, otherwise you won't be able to stop. Stop quicker, better, and more reliably with new braking components.
BMW E30 E36 Brake Master Cylinder
BMW E30 E36 Brake Master Cylinder
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373210
Part#: 34311157206
Ships in 1 Business Day
$ 177.99 USD
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$ 177.99 USD
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Direct replacement master cylinder
Brake Master Cylinder
Brake Master Cylinder
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373208
Part#: 34311156643
Ships in 1 Business Day
$ 139.99 USD
Free Shipping
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$ 139.99 USD
Free Shipping
Add to Wish List
Replace your worn-out master cylinder
Brake Master Cylinder
Brake Master Cylinder
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373206
Part#: 34311113656
Ships in 1 Business Day
$ 112.91 USD
Free Shipping
Add to Wish List
$ 112.91 USD
Free Shipping
Add to Wish List
Make sure your pedal force is actually making it to the calipers, otherwise you won't be able to stop. Stop quicker, better, and more reliably with new braking components.

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