BMW Brake Master Cylinders for BMW 7 Series E23 (1978-1987)

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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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URO Brake Master Cylinder Hose - BMW
URO Brake Master Cylinder Hose - BMW
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T#:18003807
Part#: 35006857512
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URO Brake Master Cylinder Hose - BMW

The URO Brake Master Cylinder Hose - BMW is engineered for optimal fitment and performance in your BMW’s brake system. The brake master cylinder reservoir hose plays a crucial role in ensuring proper fluid flow, and URO Parts' precise manufacturing ensures a secure and reliable connection. This hose is designed to withstand the demanding conditions of your brake system, ensuring longevity and safety.

  • Manufactured to OE dimensions for precise fitment and secure sealing
  • High-quality hose material resistant to glycol-based brake fluid corrosion
  • Ensures long-term reliability and performance under high-pressure conditions
  • Perfect for restoring the integrity of your brake system when replacing worn-out hoses
  • Easy to install, providing a hassle-free replacement experience
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Genuine BMW Master Cylinder Clevis
Genuine BMW Master Cylinder Clevis
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Genuine BMW - Corporate Logo
T#:64474
Part#: 35211154097
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$ 32.99 USD
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Genuine BMW Forkhead - L=44mm
This item fits the following BMW Chassis:
E30 M3,E30

ATE Brake Booster - E23, E24, E28
ATE Brake Booster - E23, E24, E28
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ATE - Corporate Logo
T#:587430
Part#: 34331156925
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$ 1,470.43 USD
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$ 1,470.43 USD
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Replacement Brake Booster
Gasket Ring
Gasket Ring
A10X13,5-Al
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Genuine BMW - Corporate Logo
T#:6483
Part#: 07119963073
In Stock
Sale - Save 50% $ 1.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 0.99 USD
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$ 1.99

This product was last offered at the strikethrough price on
05-14-2026

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Genuine BMW Gasket Ring
This item fits the following BMW Chassis:
E30 M3,E34 M5,E60 M5,E63 M6,E30,E34,E39,E46,E53 X5 X5,E63,E83 X3,E85 Z4

ATE Master Cylinder Reservoir Grommet
ATE Master Cylinder Reservoir Grommet
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ATE - Corporate Logo
T#:375679
Part#: 34311160133
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$ 4.99

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

$ 3.99 USD
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Secures the reservoir to the master cylinder
OE ATE Power Brake Booster - E23
OE ATE Power Brake Booster - E23
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ATE - Corporate Logo
T#:19697
Part#: 34331152825
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$ 1,511.99

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

$ 1,468.99 USD
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As you depress the brake pedal, your pedal linkage causes a shaft to move forward in response to your foot, and as this shaft moves forward, it interacts with the brake booster and master cylinder. The brake booster contains a diaphragm that separates its interior into two parts, with both in a partial vacuum. As the brake pedal is depressed, it causes a valve inside the booster to open, which in turn allows air into one side of the booster. This difference in pressure on one side helps to push the piston inside the brake master cylinder forward in response to the brake pedal, which in turn slows and stops your vehicle. If your brakes are feeling soft then it may be a good idea to replace your brake booster
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