BMW Brake Master Cylinders for BMW E90 M3 S65 4.0L

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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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Genuine BMW Master Cylinder Cap - E82/88 E9X
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:63465
Part#: 34336774451
Ships in 1-2 days
5% off MSRP $ 37.99

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

$ 35.99 USD
Free Shipping on orders $49 and up
5% off MSRP
$ 37.99

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

$ 35.99 USD
Free Shipping on orders $49 and up


Genuine BMW Cap With Warning Switch
This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92,E93

URO Brake Master Cylinder Hose - BMW
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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:18003807
Part#: 35006857512
In Stock
$ 24.99 USD
Free Shipping on orders $49 and up

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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Hella Vacuum Pump - E90, E92, E93
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Hella - Corporate Logo
T#:592491
Part#: 34332283333
In Stock at Vendor
$ 422.15 USD
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$ 422.15 USD
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Replace your failed brake booster to restore braking power

Genuine BMW Mater Cylinder Reservoir - E82/88 E9X
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Genuine BMW - Corporate Logo
T#:63141
Part#: 34326764117
Ships in 1-2 days
6% off MSRP $ 126.99

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

$ 119.99 USD
Free Shipping
6% off MSRP
$ 126.99

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

$ 119.99 USD
Free Shipping


Genuine BMW Expansion Tank
This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92,E93


Genuine BMW Brake Master Cylinder - E82 1M, E9X M3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:62610
Part#: 34312283533
Ships in 10 Business Days
7% off MSRP $ 847.99

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

$ 789.99 USD
Free Shipping on orders $49 and up
7% off MSRP
$ 847.99

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

$ 789.99 USD
Free Shipping on orders $49 and up

When the brake master cylinder goes bad, your brakes will no longer operate as they should. You might get a brake warning light on your dashboard and the brake pedal might sink down and not return to its normal position. When this occurs, be sure to replace that master cylinder. The brake master cylinder is bolted to the Brake Booster with two bolts.

Genuine BMW Brake Master Cylinder
This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92,E93

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Genuine BMW Brake Booster - E82 1M, E9X M3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:63412
Part#: 34332283392
Special Order: No Guaranteed ETA
7% off MSRP $ 640.00

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

$ 596.99 USD
Free Shipping
7% off MSRP
$ 640.00

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

$ 596.99 USD
Free Shipping

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.

This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92,E93 M3

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

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

$ 3.99 USD
Free Shipping on orders $49 and up
$ 3.99 USD
Free Shipping on orders $49 and up
Secures the reservoir to the master cylinder
Strainer Tube - E82, E84, E88, E90, E91, E92, E93
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:63142
Part#: 34326764120
In Stock
Sale - Save 24% $ 23.99

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

$ 18.15 USD
Free Shipping on orders $49 and up
Sale - Save 24%
$ 23.99

This product was last offered at the strikethrough price on
05-02-2026

$ 18.15 USD
Free Shipping on orders $49 and up


Genuine BMW Strainer Tube
This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92,E93


ATE Check Valve Gasket - E46, E82, E88, E90, E91, E92, E93, Z3, Z4 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
ATE - Corporate Logo
T#:8105
Part#: 34336765316
In Stock
$ 3.99

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

$ 2.99 USD
Free Shipping on orders $49 and up
$ 2.99 USD
Free Shipping on orders $49 and up
BMW BRAKES GASKET 34336765316

ATE Bleed Valve Screw for Dynamic Rear Sway Bar
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ATE - Corporate Logo
T#:591036
Part#: 34116768018
Ships in 1 Business Day
$ 10.08 USD
Free Shipping on orders $49 and up
Bleed Valve Screw for Dynamic Rear Sway Bar
Genuine BMW Brake Booster Seal
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:63428
Part#: 34336751977
Ships in 1-2 days
$ 5.99 USD
Free Shipping on orders $49 and up


Genuine BMW Seal, Brake Booster
This item fits the following BMW Chassis:
E70 X5M,E71 X6M,E70 X5,E71 X6,F10,F15,F16

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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