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- 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
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 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 1975-1977 3.0L Turbo (930)
Fits:
Porsche 911 1971-83
Porsche 911 (930) Turbo 1975-77
Diagram ref no 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135590502
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 1975-1977 3.0L Turbo (930)
This OE Match brake fluid reservoir retaining strap is a replacement securing strap for the brake fluid reservoir on Porsche 911 models. It is designed to match the original-style fitment and helps hold the reservoir firmly in place.
Fits:
Porsche 911 1968 - 1976
Porsche 911 (930) Turbo 1975 - 1977
Diagram ref no 6
The retaining strap secures the brake fluid reservoir in its correct mounting position. A secure reservoir helps prevent unwanted movement, vibration, or stress on the connected brake fluid lines, supporting safe and reliable brake system operation.
Functions
• Secures the brake fluid reservoir in place
• Helps prevent reservoir movement or vibration
• Supports correct brake fluid reservoir mounting
• Helps protect connected brake fluid lines from strain
• Replaces worn, missing, cracked, or damaged original straps
• Suitable for brake system service or restoration
• OE Match replacement for classic Porsche brake system repair.
Why Replace This Part?
Brake fluid reservoir retaining straps can deteriorate, stretch, crack, corrode, or go missing due to age, brake fluid exposure, heat, and previous repairs. A damaged or missing strap may allow the reservoir to move, rattle, or place stress on the brake fluid connections. Replacing the strap helps restore secure reservoir mounting and correct brake system presentation.
When to Replace This Part
• The brake fluid reservoir is loose or moving
• The original retaining strap is missing, cracked, stretched, or damaged
• The reservoir has been removed or replaced
• Brake fluid lines or reservoir fittings are being serviced
• Brake system restoration is being carried out
• The luggage compartment or front brake area is being restored
• Correct OE-style mounting hardware is required.
Where it fits on the car
This retaining strap fits at the brake fluid reservoir mounting area on Porsche 911 models. It holds the reservoir securely in position according to the factory brake system layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135501500
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 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
- Porsche 912E 4CYL 1976
The set contains the additional parts that are required for installing the balance beam brake system in the vehicle.
Fits:
Porsche 911 - 1965 to 1977
Porsche 911 - 1978 to 1989 if brake booster (servo) is deleted
Porsche 914 - 1970 to 1976
With brake beam brake pedal installation
Kit Contains:
• Brake fluid reservoirs with clamps x 2
• Connecting hoses between the reservoir and master brake cylinder with suitable clamps
• Connections on the master brake cylinder on the inlet side,
• Adapter to M10x1 thread for the brake light switch
• Pressure-switching brake light switch
• Distribution piece for the front brake circuit (if necessary, the switch can be installed at this point)
• Copper sealing rings x 4
With the standard pedals, the brake light switch is actuated mechanically by the brake pedal, which is no longer possible with the balance arm brake system.
This necessitates hydraulic actuation, which is easily integrated into the brake line using a connector and a pressure-triggering brake light switch.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135501313
The product you are viewing cross references to these numbers