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Brake Master Cylinder

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DISPLAYING 1 to 11 (of 11 products)
95002500
Product Information
Product Information
Brake fluid DOT 4 20Ltr Textar


textar

Brake fluid is one of the most important fluids in a car as without it, stopping the vehicle safely would be impossible. The Brake fluid transmits the force exerted by the driver on the brake pedal onto the wheel brake. 
To ensure perfect operation of the brakes, the brake fluid must be changed regularly during inspection or maintenance and tested with the correct brake fluid tester.

Brake fluid should be changed every two years. 

The higher the DOT class, the higher the boiling temperature and wet boiling point. Higher DOT classes tend to allow longer maintenance intervals. The DOT standards are based on the American FMVSS-116 standard of the Department of Transportation (DOT).

Boiling Point and Viscosity

Dry Boiling Point - describes the property of the sealed new brake fluid. In this state, the brake fluid is almost anhydrous (substance containing no water). The dry boiling point is usually between 240 and 280°C.

Wet Boiling Point
 - determines the property of the brake fluid at the end of its life cycle, at a water content of 3.5% the fluid should be replaced. This defined wet boiling point must not be undercut.

Viscosity - describes the flow rate of the brake fluid. The lower the viscosity, the faster the brake fluid flows through the brake system, and the faster the brake signals are transmitted. 

Important Notes
• Brake fluid is poisonous and a hazardous waste.
• Be careful when changing. The fluid weakens paints and plastics.
• It must not come into contact with eyes or skin. Always rinse spilled liquid with water.
• Do not pour the liquid into drinking water or mix with used oil.
• The colour of the brake fluid reveals nothing about its quality.
• Brake fluid should be stored in its original packaging and in a dry, cool and well-ventilated place.



Find out about Textar product verification here
Special Offer
L040
Product Information
Product Information
Brake discs, calipers, pads and brake master cylinders are the four cardinal points of each brake system; however, they are likely to be useless without the core of the entire system, the brake fluid. This component is so neglected as to be generally controlled in a summary fashion, with topping instead of a more appropriate replacement, at the change frequency recommended by the manufacturer.
brembo


DOT 4
Having an extremely high boiling point and lower viscosity than required, it meets and greatly exceeds regulatory standards. Also suitable for vehicles with ABS.

Vapour Lock formation
This sort of habit leaves room for the Vapour Lock, the formation of vapour bubbles due to boiling of the brake fluid that replace the normal fluid and are compressed, thereby sending the brake pedal to its fill stoke (spongy pedal). The origin is incident in the porosity of the tubes that make up the braking circuit, which in time draw moisture into the fluid, drastically reducing the boiling point. The result is a reduced braking efficiency.

Brembo Premium Brake Fluid
Brembo Premium brake fluids have a higher boiling point that exceeds the standard, thus offering superior resistance to the Vapour Lock and ensuring braking efficiency even at low temperatures. With high anti-corrosion properties and resistance to oxidation, Brembo brake fluid also allows for long-term unaltered chemical/physical characteristics of the fluid in operating circuit; therefore, preserving its integrity.



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Related, superseded, cross reference or alternative numbers for comparison.

L040
00004320209
00004320366
00004321082
00004330552

The product you are viewing cross references to these numbers
95006
Product Information
Product Information

Brake fluid DOT 4 LV (Low Viscosity) Textar.

textar

Textar DOT 4 LV (Low Viscosity) is especially recommended for use in hydraulic brake and clutch systems of vehicles fitted with ESP, ABS and ASR with a high boiling point and outstanding performance at very low temperatures.

DOT 4 LV (Low Viscosity)
Dry Boiling Point ≥ 260° C 
Wet Boiling Point ≥ 165° C 
Viscosity at -40C < 750 mm2 /s

Brake fluid is one of the most important fluids in a car as without it, stopping the vehicle safely would be impossible. The Brake fluid transmits the force exerted by the driver on the brake pedal onto the wheel brake. 
To ensure perfect operation of the brakes, the brake fluid must be changed regularly during inspection or maintenance and tested with the correct brake fluid tester.

Brake fluid should be changed every two years. 

The higher the DOT class, the higher the boiling temperature and wet boiling point. Higher DOT classes tend to allow longer maintenance intervals. The DOT standards are based on the American FMVSS-116 standard of the Department of Transportation (DOT).

Boiling Point and Viscosity

Dry Boiling Point - describes the property of the sealed new brake fluid. In this state, the brake fluid is almost anhydrous (substance containing no water). The dry boiling point is usually between 240 and 280°C.

Wet Boiling Point - determines the property of the brake fluid at the end of its life cycle, at a water content of 3.5% the fluid should be replaced. This defined wet boiling point must not be undercut. <

Viscosity - describes the flow rate of the brake fluid. The lower the viscosity, the faster the brake fluid flows through the brake system, and the faster the brake signals are transmitted. 

Important Notes

• Brake fluid is poisonous and a hazardous waste.
• Be careful when changing. The fluid weakens paints and plastics.
• It must not come into contact with eyes or skin. Always rinse spilled liquid with water.
• Do not pour the liquid into drinking water or mix with used oil.
• The colour of the brake fluid reveals nothing about its quality.
• Brake fluid should be stored in its original packaging and in a dry, cool and well-ventilated place.



Find out about Textar product verification here

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95006
00004330552
00004320366
00004321082
00004320209

The product you are viewing cross references to these numbers
95002
Product Information
Product Information
Brake fluid DOT 4 

textar

Brake fluid is one of the most important fluids in a car as without it, stopping the vehicle safely would be impossible. The Brake fluid transmits the force exerted by the driver on the brake pedal onto the wheel brake. 

To ensure perfect operation of the brakes, the brake fluid must be changed regularly during inspection or maintenance and tested with the correct brake fluid tester.

Brake fluid should be changed every two years. 

The higher the DOT class, the higher the boiling temperature and wet boiling point. Higher DOT classes tend to allow longer maintenance intervals. The DOT standards are based on the American FMVSS-116 standard of the Department of Transportation (DOT).

Boiling Point and Viscosity

Dry Boiling Point - describes the property of the sealed new brake fluid. In this state, the brake fluid is almost anhydrous (substance containing no water). The dry boiling point is usually between 240 and 280°C.

Wet Boiling Point - determines the property of the brake fluid at the end of its life cycle, at a water content of 3.5% the fluid should be replaced. This defined wet boiling point must not be undercut. 

Viscosity - describes the flow rate of the brake fluid. The lower the viscosity, the faster the brake fluid flows through the brake system, and the faster the brake signals are transmitted. 

Important Notes
• Brake fluid is poisonous and a hazardous waste.
• Be careful when changing. The fluid weakens paints and plastics.
• It must not come into contact with eyes or skin. Always rinse spilled liquid with water.
• Do not pour the liquid into drinking water or mix with used oil.
• The colour of the brake fluid reveals nothing about its quality.
• Brake fluid should be stored in its original packaging and in a dry, cool and well-ventilated place.

Find out about Textar product verification here

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95002
00004430501
00004321082
00004330552
00004320366
00004320209

The product you are viewing cross references to these numbers
Special Order item
113945515G
Product Information
Product Information
Brake light switch 3pin.
Fits into the Brake master cylinder

porsche

Fits:
Porsche 911 1974-86
Porsche 924 1976-80
Porsche 928 1978-95

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

113945515G
113945515G

The product you are viewing cross references to these numbers
Special Offer
113945515G/1
Product Information
Product Information
Brake light switch 3pin.
Fits into the Brake master cylinder

oematch

Fits:
Porsche 911 1974-86
Porsche 924 1976-80
Porsche 928 1978-95

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

113945515G
113945515G
8196600200
911613641101

The product you are viewing cross references to these numbers
Special Offer
92835501104/1
Product Information
Product Information
Brake master cylinder. 

fte

Fits:
Porsche 924 Turbo 1981-82
Porsche 928/S 4.5L, 4.7L 1978-83

Related reference numbers
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92835501104
92835501104

The product you are viewing cross references to these numbers
Special Order item
92735501124
Product Information
Product Information
Brake master cylinder. RHD Cars.

porsche

Fits:
Porsche 928 S2 / S4 / GT / GTS 4.7L 1986-96


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92735501124
92735501124

The product you are viewing cross references to these numbers
Special Order item
92835530502
Product Information
Product Information
Brake pressure regulator.

porsche

Fits:
Porsche 911 1984-89 Carrera
Porsche 964 1989 Turbo Look C2 / C4
Porsche 928 1983-86
Porsche 944 1985-89 (Not S and Turbo)

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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92835530502
92835530502

The product you are viewing cross references to these numbers
Special Order item
95535592100
Product Information
Product Information
Rubber Seal.

porsche

Fits:
Porsche 911 / 911S / Carrera 3.0 1977>>
Porsche 930 Turbo 1977>>
Porsche 924 1976-85
Porsche 924S 1986-88
Porsche 928 1978-95
Porsche 944 1982-90
Porsche 968 1992-95

Click 'zoom in' for large parts diagram.
Diagram ref no 22.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95535592100
91135592100
95535592100

The product you are viewing cross references to these numbers
Special Order item
91135592200
Product Information
Product Information
Pipe sealing grommet brake master cylinder. 
Sold each - 2 required per car

porsche

Fits:

Porsche 911 - 1974 to 1989
Porsche 911 turbo - 1975 to 1989
Porsche 964 Carrera 4 / turbo - 1989 to 1994
Porsche 924 turbo - 1979 to 1984
Porsche 924S - 1986 to 1988
Porsche 944 - 1982 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 - 1978 to 1995

Click 'Zoom in' for large parts diagram.
Diagram ref no 20




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Related, superseded, cross reference or alternative numbers for comparison.

91135592200
91135592200

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DISPLAYING 1 to 11 (of 11 products)
About Brake Master Cylinder

Porsche Brake Master Cylinders | Design911 Precision Replacement Parts for Hydraulic Performance & Safety

The brake master cylinder is the heart of your Porsche’s braking system, converting pedal pressure into hydraulic force that engages the brake calipers. It ensures consistent, balanced braking across all wheels — a key factor in maintaining Porsche’s renowned control and stopping performance. When the master cylinder begins to fail, it can cause pressure loss, spongy pedals, or brake fade, making timely replacement essential for safety and precision.

At Design911, we stock a complete range of brake master cylinders, expertly engineered for exact fitment, consistent pressure delivery, and long-term durability. Each unit is crafted from high-quality materials to withstand intense hydraulic pressures and thermal cycling. Whether for road use, motorsport preparation, or classic restoration, our replacement master cylinders restore the precision and performance your Porsche was built to deliver.

What Does a Brake Master Cylinder Do?

The master cylinder plays a critical role in the hydraulic braking system, converting the mechanical pressure from your foot into fluid pressure distributed to each caliper.

Core Functions:
• Converts pedal movement into hydraulic pressure.
• Ensures even brake force distribution across all wheels.
• Maintains consistent pedal feel and braking response.
• Supports ABS and traction control systems.
• Provides safe, reliable braking performance in all conditions.

Without a properly functioning master cylinder, your Porsche’s braking system cannot maintain hydraulic balance or stopping efficiency.

Why Do Brake Master Cylinders Fail or Degrade?

Brake master cylinders endure constant hydraulic pressure and exposure to brake fluid — conditions that can lead to internal wear, leaks, or contamination over time.

Common Causes of Failure Include:
• Worn internal seals leading to pressure loss or leaks.
• Corrosion caused by moisture-contaminated brake fluid.
• Scored or pitted cylinder bores reducing seal integrity.
• Air ingress into the hydraulic system.
• Age-related degradation of rubber components.

When a master cylinder fails, it can cause reduced braking efficiency, fluid leaks, or an unresponsive pedal — all of which compromise safety and control.

Why Replace or Upgrade Your Porsche Brake Master Cylinder?

Replacing a worn or leaking master cylinder restores full hydraulic pressure and ensures reliable braking response. Design911’s precision-engineered master cylinders deliver performance and durability that meet or exceed Porsche standards.

Key Benefits:
• Restores safe and consistent braking performance.
• Prevents fluid leaks and loss of hydraulic pressure.
• Maintains proper brake balance across all wheels.
• Constructed from corrosion-resistant materials for longevity.
• Direct-fit replacements for easy installation.
• Suitable for classic and modern Porsche models.

Design911’s Porsche brake master cylinders offer exceptional reliability and performance — ensuring your Porsche stops with the same confidence and precision as it accelerates.

Highlights

• Premium Porsche brake master cylinders for performance and restoration.
• Precision-machined for superior hydraulic control.
• Resistant to corrosion, heat, and fluid breakdown.
• Ensures firm pedal feel and consistent braking response.
• Compatible with both road and track applications.
• Designed for easy installation and long service life.

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