BMW Brake Master Cylinders for BMW E30 M3 S14 2.3L

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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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E30 24V Swap Brake Fluid Reservoir Relocation Kit
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Turner Motorsport - Corporate Logo
T#:48642684
Part#: 059282LA01KT1
Ships in 4 Business Days
New Item
Sale - Save 6% $ 194.99

This product was last offered at the strikethrough price on
05-03-2026

$ 183.40 USD
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Sale - Save 6%
$ 194.99

This product was last offered at the strikethrough price on
05-03-2026

$ 183.40 USD
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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.

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E30 24V Swap Brake Fluid Reservoir Relocation Bracket
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Turner Motorsport - Corporate Logo
T#:48642681
Part#: 059282LA01KT
In Stock
New Item
Sale - Save 26% $ 66.99

This product was last offered at the strikethrough price on
05-03-2026

$ 49.55 USD
Free Shipping
Sale - Save 26%
$ 66.99

This product was last offered at the strikethrough price on
05-03-2026

$ 49.55 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.

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Brake Master Cylinder Upgrade - E30 325e, 325i, M3
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Turner Motorsport - Corporate Logo
T#:14298
Part#: TMS14298
Ships in 1 Business Day
$ 375.99 USD
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$ 375.99 USD
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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
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Brake Master Cylinder - E32 735i 750il, E30 Upgrade
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ATE - Corporate Logo
T#:15922
Part#: 34311156643
Ships in 1 Business Day
$ 433.94 USD
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$ 433.94 USD
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This is the OEM brake master cylinder for E32 750il made by ATE. This master cylinder can be used as an upgrade for E30 models (in conjunction with brake line #34326755585).

This item fits the following BMWs:
1987-3/1988 E32 BMW 735i 735il
1988-1994 E32 BMW 750il

Brake Master Cylinder Upgrade
1984-1991 E30 BMW 325e 325es 325i 325ic 325is M3
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Cohline Brake Booster Vacuum Hose - E10, E12, E21, E24, E28, E3, E30,...
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Cohline - Corporate Logo
T#:8095
Part#: 34331115926
In Stock at Vendor
$ 24.34 USD
Free Shipping on orders $49 and up
$ 24.34 USD
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BMW BRAKES VACUUM HOSE 34331115926
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
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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 Brake Booster Vacuum Hose - E32 E10 E39 E24 E28 E3 E30 E1...
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Genuine BMW - Corporate Logo
T#:368303
Part#: 34331115926
Ships in 1 day
2% off MSRP $ 41.99

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

$ 40.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 41.99

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

$ 40.99 USD
Free Shipping on orders $49 and up
Genuine BMW Master Cylinder Clevis
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Genuine BMW - Corporate Logo
T#:64474
Part#: 35211154097
Ships in 1 day
$ 32.99 USD
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Genuine BMW Forkhead - L=44mm
This item fits the following BMW Chassis:
E30 M3,E30


Genuine BMW Brake Master Cylinder Cap
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Genuine BMW - Corporate Logo
T#:8088
Part#: 34321120841
Ships in 1 day
3% 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.

$ 137.99 USD
Free Shipping
3% 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.

$ 137.99 USD
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Genuine BMW Cap With Warning Switch - Ate
This item fits the following BMW Chassis:
E30 M3,E30


Genuine BMW Brake fluid reservoir
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Genuine BMW - Corporate Logo
T#:23053
Part#: 34321151729
Ships in 4 Business Days
4% off MSRP $ 744.99

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

$ 716.99 USD
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4% off MSRP
$ 744.99

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

$ 716.99 USD
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Genuine BMW Expansion Tank - Ate
This item fits the following BMW Chassis:
E30 M3,E30

Cap With Warning Switch - E24, E30, E32
Ate
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Genuine BMW - Corporate Logo
T#:62719
Part#: 34321161543
Ships in 7 Business Days
3% off MSRP $ 124.99

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

$ 120.99 USD
Free Shipping
3% off MSRP
$ 124.99

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

$ 120.99 USD
Free Shipping


Genuine BMW Cap With Warning Switch - Ate
This item fits the following BMW Chassis:
E30 M3,E30

Cable Socket Female - E24, E3, E30, E31, E32, E34, E39
B=6,5/L=19,5
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Genuine BMW - Corporate Logo
T#:139848
Part#: 61131376460
In Stock
Sale - Save 36% $ 1.99

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

$ 1.28 USD
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Sale - Save 36%
$ 1.99

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

$ 1.28 USD
Free Shipping on orders $49 and up


Genuine BMW Cable Socket Female - B=6,5/L=19,5
This item fits the following BMW Chassis:
E30 M3,E34 M5,E39 M5,E30,E34,E39



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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Sale - Save 50%
$ 1.99

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

$ 0.99 USD
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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
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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
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Secures the reservoir to the master cylinder
ATE O-Ring - E10, E12, E21, E24, E28, E3, E30, E9
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ATE - Corporate Logo
T#:1196093
Part#: 34314650345
In Stock at Vendor
$ 4.99 USD
Free Shipping on orders $49 and up
Seals the brake master cylinder to the power brake booster.

Race German 24V Swap E30 Brake Booster Relocation Template
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Race German - Corporate Logo
T#:7703237
Part#: RGE30BBRT24V
Ships in 1 Business Day
$ 17.99 USD
Free Shipping on orders $49 and up
Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. When you perform a 24V engine swap in your E30, you will need to move the brake booster over 1/2" so the intake manifold will not interfere with the the brake booster. Race German's 24v brake booster template takes all the guess work out for you. This template lines up with the existing brake booster holes, and gives you the exact position to drill the new holes. This little template can save you time and headaches.
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