URO BMW Brake Master Cylinders for BMW 5 Series E39 (1996-2003)

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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 Master Cylinder
Brake Master Cylinder
For vehicles with DSC and a production date from 09/1998 For vehicles with DSC For vehicles with DSC and a production date from 09/1999
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T#:373215
Part#: 34311165544
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$ 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
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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