BMW Brake Master Cylinders for BMW 3 Series E30 (1984-1991)

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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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Turner Motorsport - Corporate Logo
T#:48642684
Part#: 059282LA01KT1
In Stock
Sale - Save 3% $ 198.99

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

$ 192.77 USD
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Sale - Save 3%
$ 198.99

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

$ 192.77 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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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.

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Turner Motorsport - Corporate Logo
T#:14298
Part#: TMS14298
In Stock
$ 413.99

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

$ 348.99 USD
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$ 348.99 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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ATE - Corporate Logo
T#:15922
Part#: 34311156643
In Stock
$ 433.94

This product was last offered at the strikethrough price on
06-26-2026

$ 425.56 USD
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$ 425.56 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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Genuine BMW - Corporate Logo
T#:368303
Part#: 34331115926
Ships in 1-2 days
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 - Corporate Logo
T#:62718
Part#: 34321161541
Ships in 2 Business Days
2% off MSRP $ 119.99

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

$ 117.99 USD
Free Shipping
2% off MSRP
$ 119.99

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

$ 117.99 USD
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Genuine BMW Cap With Warning Switch - Ate
This item fits the following BMW Chassis:
E30


Genuine BMW Brake Master Cylinder Cap - E30 325is 325e 325es ...
For vehicles with production date up to 09/1987
Genuine BMW - Corporate Logo
T#:19738
Part#: 34321156029
Ships in 2 Business Days
2% off MSRP $ 61.99

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

$ 60.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 61.99

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

$ 60.99 USD
Free Shipping on orders $49 and up


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

Genuine BMW - Corporate Logo
T#:8101
Part#: 34331158113
Ships in 2 Business Days
3% off MSRP $ 114.99

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

$ 111.99 USD
Free Shipping on orders $49 and up
3% off MSRP
$ 114.99

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

$ 111.99 USD
Free Shipping on orders $49 and up
This is the Genuine BMW brake vacuum check valve for E30 325i and E34 525i with M20 engine/ This check valve is mounted on the vacuum line that goes to the brake booster from the throttle body.

This item fits the following BMWs:
1984-1991 E30 BMW 325i 325ic 325is 325ix
1989-1990 E34 BMW 525i
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Genuine BMW - Corporate Logo
T#:25094
Part#: 11611284269
In Stock
Sale - Save 8% $ 55.99

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

$ 51.59 USD
Free Shipping on orders $49 and up
Sale - Save 8%
$ 55.99

This product was last offered at the strikethrough price on
06-15-2026

$ 51.59 USD
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Genuine BMW Air Pump -
This item fits the following BMW Chassis:
E30,E34,E38,E39

Fits BMW Engines including:
M20,M62


Genuine BMW - Corporate Logo
T#:64474
Part#: 35211154097
Ships in 2 Business Days
$ 32.99 USD
Free Shipping on orders $49 and up


Genuine BMW Forkhead - L=44mm
This item fits the following BMW Chassis:
E30 M3,E30

Genuine BMW - Corporate Logo
T#:8088
Part#: 34321120841
Ships in 3 Business Days
2% 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.

$ 138.99 USD
Free Shipping
2% 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.

$ 138.99 USD
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Genuine BMW Cap With Warning Switch - Ate
This item fits the following BMW Chassis:
E30 M3,E30

Genuine BMW - Corporate Logo
T#:23053
Part#: 34321151729
Ships in 4 Business Days
3% 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.

$ 720.99 USD
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3% 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.

$ 720.99 USD
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Genuine BMW Expansion Tank - Ate
This item fits the following BMW Chassis:
E30 M3,E30



Genuine BMW - Corporate Logo
T#:62719
Part#: 34321161543
Ships in 7 Business Days
2% 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.

$ 121.99 USD
Free Shipping
2% 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.

$ 121.99 USD
Free Shipping


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

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
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 - Corporate Logo
T#:375679
Part#: 34311160133
In Stock
$ 4.99

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

$ 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

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.
Genuine BMW - Corporate Logo
T#:62685
Part#: 34321157396
Ships in 3 Business Days
$ 8.99 USD
Free Shipping on orders $49 and up


Genuine BMW Gasket
This item fits the following BMW Chassis:
E34 M5,E30,E34,E38,E39