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OE Match
Brake Fluid Reservoir Cap Seal
High-quality replacement brake fluid reservoir cap seal designed for classic Porsche 911 (1968–1986), Porsche 914, and Porsche 928 models.
This gasket fits inside the brake fluid reservoir cap,
providing a secure seal to prevent fluid leakage and protect the braking system
from moisture and contamination.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
- Porsche 912E 4CYL 1976
Diagram ref no 3
Manufactured to OEM specifications, this seal ensures reliable performance and is an essential component for maintaining proper brake system function, especially on classic and air-cooled Porsche models.
Key Features
• Direct replacement brake fluid reservoir cap seal
• Fits inside reservoir cap for secure sealing
• OEM-style fit and performance
• Helps prevent brake fluid leaks and contamination
• Durable material for long-term reliability
• Ideal for maintenance and restoration
Function and Purpose
This cap seal ensures a tight closure of the brake fluid reservoir.
It helps to:
• Prevent brake fluid leakage
• Protect system from moisture ingress
• Maintain correct hydraulic pressure
• Preserve braking system performance
Why Replace Your Brake Fluid Cap Seal
Over time, seals can degrade due to exposure to brake fluid and environmental conditions.
Common issues include:
• Cracked or hardened rubber
• Fluid seepage around the cap
• Moisture entering the system
• Reduced braking performance
Replacing the seal helps maintain safe and reliable braking.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135590800
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
- Porsche 912E 4CYL 1976
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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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
L040
The product you are viewing cross references to these numbers
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Express Delivery
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.
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Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95002
The product you are viewing cross references to these numbers
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Brake fluid DOT 4 LV (Low Viscosity) 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
The product you are viewing cross references to these numbers
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