Find Parts That Fit Your Vehicle

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.

Sub-Categories

Sort By:

E30 24V Swap Brake Fluid Reservoir Relocation Kit
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:48642684
Part#: 059282LA01KT1
Ships in 4 Business Days
Sale - Save 2% $ 198.99

This product was last offered at the strikethrough price on
06-14-2026

$ 194.56 USD
Free Shipping
Sale - Save 2%
$ 198.99

This product was last offered at the strikethrough price on
06-14-2026

$ 194.56 USD
Free Shipping

When swapping an M5X engine into your E30, interference between the intake manifold and brake booster-mounted reservoir is a common problem. Tighter clearance necessitates the use of a different brake booster, which means the brake fluid reservoir will need to be retrofitted or relocated. This is particularly difficult when using the larger, dual-diaphragm brake booster from an E32 or E34.

To solve this issue, we've designed a clean, OE-style solution that requires zero fabrication. Our stainless steel bracket relocates the brake fluid reservoir to the original, left-hand strut tower location, once used for mounting the M20's power steering fluid reservoir. This provides the clearance necessary for fitting an M50/S50, M52/S52, M54, or S54 in the engine bay of your E30.

Designed with the DIY E30 24V swap community in mind, our design delivers factory-quality fit and finish with none of the guesswork.

FEATURES

Brushed stainless steel bracket for corrosion resistance and durability Yellow zinc-plated hardware to match the original Genuine BMW fasteners Compatible with the ATE remote reservoir found on E10 2002 models (part number 34321112399) KIT CONTENTS

Turner Motorsport Brake Fluid Reservoir Bracket & Installation Hardware ATE Remote Brake Fluid Reservoir Genuine BMW Connecting Pipe Remote Reservoir Hose PRODUCT DEVELOPMENT

Our 24V Swap Brake Fluid Reservoir Bracket was designed, engineered, tested, and quality inspected by our Research and Development team in our Wadsworth, Ohio, facility. We strive for the highest level of precision and quality through leading-edge product development technology, including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

Show More Show Less
E30 24V Swap Brake Fluid Reservoir Relocation Bracket
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:48642681
Part#: 059282LA01KT
In Stock
Sale - Save 26% $ 68.99

This product was last offered at the strikethrough price on
06-14-2026

$ 51.05 USD
Free Shipping
Sale - Save 26%
$ 68.99

This product was last offered at the strikethrough price on
06-14-2026

$ 51.05 USD
Free Shipping

When swapping an M5X engine into your E30, interference between the intake manifold and brake booster-mounted reservoir is a common problem. Tighter clearance necessitates the use of a different brake booster, which means the brake fluid reservoir will need to be retrofitted or relocated. This is particularly difficult when using the larger, dual-diaphragm brake booster from an E32 or E34.

To solve this issue, we've designed a clean, OE-style solution that requires zero fabrication. Our stainless steel bracket relocates the brake fluid reservoir to the original, left-hand strut tower location, once used for mounting the M20's power steering fluid reservoir. This provides the clearance necessary for fitting an M50/S50, M52/S52, M54, or S54 in the engine bay of your E30.

Designed with the DIY E30 24V swap community in mind, our design delivers factory-quality fit and finish with none of the guesswork.

Looking for a complete kit that includes the brake fluid reservoir, hose, and other mounting components? See T#48642684.

FEATURES

Brushed stainless steel bracket for corrosion resistance and durability Yellow zinc-plated hardware to match the original Genuine BMW fasteners Compatible with the ATE remote reservoir found on E10 2002 models (part number 34321112399) PRODUCT DEVELOPMENT

Our 24V Swap Brake Fluid Reservoir Bracket was designed, engineered, tested, and quality inspected by our Research and Development team in our Wadsworth, Ohio, facility. We strive for the highest level of precision and quality through leading-edge product development technology, including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

Show More Show Less
Brake Master Cylinder Upgrade - E30 325e, 325i, M3
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:14298
Part#: TMS14298
Ships in 1-2 days
$ 413.99

This product was last offered at the strikethrough price on
07-14-2026

$ 348.99 USD
Free Shipping
$ 348.99 USD
Free Shipping
This is the 25mm master cylinder upgrade for E30 3 series. It features the larger master cylinder from the E32 750il (#34311156643) with the new required brake line (#34326755585). This set up is used on many track driven E30's to allow for extra stopping power.

This item fits the following BMWs:
1984-1991 E30 BMW 325e 325es 325i 325ic 325is M3
Show More Show Less

Genuine MINI - Corporate Logo
T#:63431
Part#: 34336756235
Ships on Oct 7, 2026
7% off MSRP $ 141.99

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

$ 131.99 USD
Free Shipping on orders $49 and up
7% off MSRP
$ 141.99

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

$ 131.99 USD
Free Shipping on orders $49 and up
Genuine MINI EXPANSION TANK WITH WARNING

TRW - Corporate Logo
T#:592494
Part#: 34336779742
In Stock
$ 327.99

This product was last offered at the strikethrough price on
07-01-2026

$ 244.65 USD
Free Shipping
$ 244.65 USD
Free Shipping
Make sure you car stops on a dime by replacing a faulty or leaky brake booster
TRW - Corporate Logo
T#:12758
Part#: 34311162915
Ships in 5 Business Days
$ 341.79 USD
Free Shipping
$ 341.79 USD
Free Shipping
BRAKE MASTER CYLINDER:343021

TRW - Corporate Logo
T#:15925
Part#: 34312282343
Ships in 2 Business Days
$ 168.72 USD
Free Shipping
$ 168.72 USD
Free Shipping
This is an OEM replacement brake master cylinder for the E46 M3.

This item fits the following BMWs:
2001-2002 E46 BMW M3, M3 cpnvertible
Genuine MINI - Corporate Logo
T#:63414
Part#: 34332753124
In Stock
Sale - Save 7% $ 35.61

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

$ 32.94 USD
Free Shipping on orders $49 and up
Sale - Save 7%
$ 35.61

This product was last offered at the strikethrough price on
08-26-2026

$ 32.94 USD
Free Shipping on orders $49 and up
Genuine MINI VACUUM PIPE

Genuine MINI - Corporate Logo
T#:418833
Part#: 34336770607
Ships in 3 Business Days
6% off MSRP $ 30.99

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

$ 28.99 USD
Free Shipping on orders $49 and up
6% off MSRP
$ 30.99

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

$ 28.99 USD
Free Shipping on orders $49 and up

TRW - Corporate Logo
T#:374811
Part#: 34336760461
Ships in 1-2 days
$ 414.93 USD
Free Shipping
$ 414.93 USD
Free Shipping
Restore proper braking performance
TRW - Corporate Logo
T#:593986
Part#: 34336786586
Ships in 3 Business Days
$ 271.99

This product was last offered at the strikethrough price on
04-20-2026

$ 246.99 USD
Free Shipping
$ 246.99 USD
Free Shipping
Replacement Brake Master Cylinder from TRW
TRW - Corporate Logo
T#:13585
Part#: 34331156978
Ships in 2 Business Days
$ 173.99

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

$ 169.62 USD
Free Shipping
$ 169.62 USD
Free Shipping
This is an OEM replacement brake master cylinder that fits many E32 and E34 models. If your original BMW brake master cylinder has failed, this is the high quality replacement you need. 3/1988-1992 E32 BMW 735i 735il
1989-1990 E34 BMW 525i
1989-1995 E34 BMW 535i M5
Show More Show Less


TRW - Corporate Logo
T#:594031
Part#: 34326779736
Ships in 3 Business Days
$ 405.78 USD
Free Shipping
$ 405.78 USD
Free Shipping
Includes sealing o-ring and master cylinder to brake booster nuts.
FTE - Corporate Logo
T#:27905128
Part#: 34336796729
Ships in 1-2 days
$ 504.00

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

$ 489.99 USD
Free Shipping on orders $49 and up
$ 489.99 USD
Free Shipping on orders $49 and up
TRW - Corporate Logo
T#:13581
Part#: 34316757743
Ships in 4 Business Days
$ 262.90 USD
Free Shipping
$ 262.90 USD
Free Shipping
This is an OEM replacement brake master cylinder that fits many E53 X5 models. If your original BMW brake master cylinder has failed, this is the high quality replacement you need.

This item fits the following BMWs:
2002-2006 E53 BMW X5 3.0i X5 4.4i X5 4.6is X5 4.8is
Show More Show Less

Genuine MINI - Corporate Logo
T#:186272
Part#: 34336857907
Special Order: No Guaranteed ETA
8% off MSRP $ 495.99

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

$ 456.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 495.99

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

$ 456.99 USD
Free Shipping on orders $49 and up
Genuine Mini Brake Master Cylinder

Upgrade your Mini's braking system with the Genuine Mini R56 Brake Master Cylinder. This OEM part ensures reliable performance and precise braking control for Mini R56 models. Engineered to Mini's exact specifications, it provides seamless integration and enhanced safety on the road. With durable construction and efficient hydraulic operation, this brake master cylinder maintains optimal braking efficiency, ensuring a smooth and responsive braking experience.

  • Genuine OEM part for reliability
  • Ensures precise braking control
  • Seamless integration with Mini R56 models
  • Durable construction for long-lasting performance
  • Enhances safety and braking efficiency

Upgrade your Mini with the Genuine Mini Brake Master Cylinder for improved braking performance.

Show More Show Less

TRW - Corporate Logo
T#:23615512
Part#: 193321071931
Back Ordered
$ 330.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
TRW - Corporate Logo
T#:23615517
Part#: 193321071832
Back Ordered
$ 327.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less

TRW - Corporate Logo
T#:25142295
Part#: 34336792956
Back Ordered
$ 296.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
TRW - Corporate Logo
T#:593987
Part#: 53706041381
Ships in 2 Business Days
$ 301.55 USD
Free Shipping on orders $49 and up
Replacement Brake Master Cylinder from TRW

TRW - Corporate Logo
T#:23615518
Part#: 193321071863
Ships in 3 Business Days
$ 324.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less

TRW - Corporate Logo
T#:23615508
Part#: 193321071955
Ships in 3 Business Days
$ 517.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
TRW - Corporate Logo
T#:23615510
Part#: 193321071917
Back Ordered
$ 205.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
TRW - Corporate Logo
T#:25042538
Part#: 193321071962
Ships in 3 Business Days
$ 348.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less


TRW - Corporate Logo
T#:16873825
Part#: 34333450589
Ships in 3 Business Days
$ 528.99

This product was last offered at the strikethrough price on
05-08-2026

$ 513.99 USD
Free Shipping on orders $49 and up
$ 513.99 USD
Free Shipping on orders $49 and up
When a brake booster is failing you may see braking effort increases. The engine runs poorly or stalls with force on the brake pedal. If the brake booster is in fact faulty it is highly recommended to replace it as soon as possible.
Show More Show Less
TRW - Corporate Logo
T#:23615511
Part#: 193321071825
Ships in 3 Business Days
$ 372.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
TRW - Corporate Logo
T#:23615507
Part#: 193321071788
Ships in 3 Business Days
$ 542.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less

Genuine MINI - Corporate Logo
T#:407898
Part#: 11667556919
Ships in 3 Business Days
8% off MSRP $ 475.21

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

$ 435.24 USD
Free Shipping
8% off MSRP
$ 475.21

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

$ 435.24 USD
Free Shipping

Genuine MINI - Corporate Logo
T#:217523
Part#: 11668654605
Ships in 3 Business Days
8% off MSRP $ 511.99

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

$ 471.99 USD
Free Shipping
8% off MSRP
$ 511.99

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

$ 471.99 USD
Free Shipping
Genuine Mini Vacuum Pump - 11668654605
Genuine MINI - Corporate Logo
T#:14642
Part#: 11667586424
Ships in 3 Business Days
8% off MSRP $ 511.55

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

$ 469.95 USD
Free Shipping
8% off MSRP
$ 511.55

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

$ 469.95 USD
Free Shipping
Genuine MINI VACUUM PUMP
Fits BMW Engines including:
N18


Genuine MINI - Corporate Logo
T#:15938
Part#: 34336786585
Ships in 3 Business Days
8% off MSRP $ 495.99

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

$ 456.99 USD
Free Shipping
8% off MSRP
$ 495.99

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

$ 456.99 USD
Free Shipping
Genuine MINI BRAKE MASTER CYLINDER
Febi - Corporate Logo
T#:38452807
Part#: 11660151054
Special Order: No Guaranteed ETA
$ 224.99 USD
$ 224.99 USD
Most vehicles send engine vacuum from the intake manifold to the brake booster to provide power assistance to the braking system. However, due to your vehicle's engine having different vacuum characteristics, BMW decided to use an electronically operated auxiliary vacuum pump instead. Mounted to the front of the cylinder head, this part serves as the vacuum source and replaces the vacuum your brake booster would be receiving from the intake manifold. An auxiliary vacuum pump failure could cause many symptoms, most commonly a harder-feeling brake pedal resulting in longer stopping distances. A failure could also result in a vacuum leak, triggering a check engine light and potentially causing the engine to stall and run poorly. If your car exhibits any of the above symptoms, it may be time to replace your vacuum pump. Thankfully, this Febi replacement functions identically to the factory component.
Show More Show Less

FTE - Corporate Logo
T#:19743
Part#: 34311156273
Back Ordered
$ 341.99

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

$ 332.99 USD
Free Shipping
$ 332.99 USD
Free Shipping
This is an OEM replacement brake master cylinder from FTE.

FTE - Corporate Logo
T#:8081
Part#: 34311121911
Back Ordered
$ 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
BRAKES PLUG 34311121911
TRW - Corporate Logo
T#:23615513
Part#: 193321071764
Back Ordered
$ 263.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
Febi - Corporate Logo
T#:53396914
Part#: 11667586424
Special Order: No Guaranteed ETA
New Item
$ 163.99 USD
Free Shipping on orders $49 and up


TRW - Corporate Logo
T#:25142292
Part#: 34336779682
Back Ordered
$ 292.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
TRW - Corporate Logo
T#:25142289
Part#: 193321071849
Back Ordered
$ 377.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
TRW - Corporate Logo
T#:25142287
Part#: 193321071672
Back Ordered
$ 193.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less

TRW - Corporate Logo
T#:23615509
Part#: 193321071856
Back Ordered
$ 392.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less