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Brake Master Cylinder
By OE Match
- 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 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- 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
Fits into the Brake master cylinder
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Related, superseded, cross reference or alternative numbers for comparison.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
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)
- Porsche 914 (1970-1976)
The OE MATCH Brake Master Cylinder BIG BORE is a hydraulic braking component designed to convert brake pedal force into hydraulic pressure for the vehicle’s braking system. Featuring a larger bore design, this master cylinder is engineered to provide increased fluid displacement, making it particularly suitable for vehicles fitted with upgraded brake calipers or performance braking systems that require greater hydraulic volume.
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 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
This is a high performance upgrade to the stock Porsche 911 Master Cylinder for non-power brake applications. The increased 23mm bore (vs. 19mm) should be used on cars that are fitted with 'larger than stock' brakes to increase pedal pressure and feel. Unlike other kits on the market, which require modifications to the lines and the push rod, our Master Cylinder is a direct fit.
The master cylinder is designed to deliver precise brake pedal feel, consistent hydraulic pressure, and reliable braking performance. As the central component of the hydraulic braking system, it plays a critical role in ensuring safe, responsive, and predictable stopping power.
What This Product Does:
- Converts brake pedal input into hydraulic pressure
- Supplies brake fluid pressure to the braking system
- Provides increased fluid displacement through its larger bore design
- Supports performance and upgraded brake system applications
- Maintains consistent brake pedal feel and braking response
- Works with dual-circuit braking systems for enhanced safety
Symptoms Of Wear Or Failure:
- Soft or spongy brake pedal feel
- Brake pedal slowly sinking under pressure
- Reduced braking effectiveness
- Brake fluid leaks around the master cylinder
- Inconsistent brake pressure or pedal response
- Difficulty building hydraulic pressure
- Brake warning lights illuminating
- Internal seal wear causing pressure loss between circuits
Why Replacement Matters:
- Restores correct hydraulic pressure throughout the braking system
- Improves brake pedal feel and responsiveness
- Ensures consistent and predictable braking performance
- Prevents brake fluid leaks and pressure loss
- Supports safe operation of dual-circuit braking systems
- Maintains compatibility with performance brake upgrades
- Reduces the risk of braking system failure
- Helps preserve driver confidence and vehicle safety under all driving conditions
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135501202
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 914 (1970-1976)
- Porsche 912E 4CYL 1976
Brake master cylinder reservoir (also known as a brake fluid reservoir with cap), manufactured to match original equipment specifications for classic Porsche vehicles. This reservoir holds and supplies brake fluid to the master cylinder, facilitating proper hydraulic pressure within the brake system and ensuring safe, effective braking performance.
Fits:
Porsche 911 1968
Porsche 911 1974 - 1986
Porsche 911 (930) 1975 - 1977
Porsche 914 1970 - 1976 (914-1.8/1.8V ; 914-2.0)
Diagram ref no 1.
The brake fluid reservoir sits atop the master cylinder and holds the hydraulic brake fluid needed for your vehicle’s braking system. As brake fluid levels drop during use, the reservoir compensates, ensuring uninterrupted fluid supply. Its cap seals the system, preventing contamination and fluid loss while withstanding under-hood heat and exposure to brake fluid.
Over time, brake fluid reservoirs can become cracked, brittle, or warped due to heat and constant exposure to corrosive brake fluid. A compromised reservoir can lead to fluid leaks, low brake fluid levels, and ultimately reduced braking performance or failure. Replacing it restores integrity to the brake system and helps ensure a safer, more reliable driving experience.
Replace the brake fluid reservoir when you observe any of the following:
• Visible cracks, splits, or deformations in the reservoir body
• Fluid leaks around the cap or reservoir walls
• Discoloured or contaminated reservoir plastic
• Brake fluid level dropping frequently without visible brake system leaks
• During a brake system overhaul or master cylinder replacement
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135501313
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)
- Porsche 914 (1970-1976)
The OE MATCH Brake Master Cylinder, Standard 19mm Bore is a hydraulic braking system component designed to convert brake pedal force into hydraulic pressure, allowing effective operation of the vehicle’s braking system. Featuring a standard 19mm bore, this master cylinder replicates the original factory specification, providing the correct hydraulic balance, pedal feel, and braking performance intended by Porsche.
For Cars With Stop Light Switch.
NOTE: Does Not Come With New Switch. Has To Be Transferred Over Or Bought Separately. Part Number 90161311500
Fits:
The master cylinder is engineered for precise brake modulation, reliable fluid pressure generation, and long-term durability. As the central component of the braking system, it distributes hydraulic pressure to the brake calipers or wheel cylinders, ensuring safe and predictable vehicle stopping performance.
What This Product Does:
- Converts brake pedal force into hydraulic pressure
- Distributes brake fluid pressure throughout the braking system
- Provides the correct hydraulic volume for standard braking setups
- Maintains original factory brake pedal feel and response
- Supports safe and consistent braking performance
- Works with dual-circuit braking systems for added safety
Symptoms Of Wear Or Failure:
- Soft or spongy brake pedal feel
- Brake pedal slowly sinking under sustained pressure
- Reduced braking performance or longer stopping distances
- Brake fluid leakage around the master cylinder
- Inconsistent brake pressure or uneven braking response
- Difficulty maintaining hydraulic pressure
- Brake warning lights illuminating
- Internal seal deterioration causing fluid bypass and pressure loss
Why Replacement Matters:
- Restores proper hydraulic brake pressure
- Improves brake pedal feel and responsiveness
- Maintains factory braking characteristics and performance
- Prevents brake fluid leaks and pressure loss
- Supports safe operation of the dual-circuit braking system
- Reduces the risk of brake system failure
- Ensures predictable and consistent stopping performance
- Helps maintain driver confidence and vehicle safety under all driving conditions
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135501202
The product you are viewing cross references to these numbers
- 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)
Fits:
Porsche 911 SC / Carrera 3.0L / 3.2L 1977-89
Porsche 930 Turbo with servo 3.0L 1975-1977
Diameter of the bore: ø 20.64mm
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135501112
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)
- Porsche 914 (1970-1976)
Fits:
Porsche 911 1965-77
Porsche 911 (930) Turbo 1975-77
Porsche 912 1968-69
Porsche 912 1976
Porsche 914 1970-76
Price is for each.
Click 'Zoom in' for large parts diagram.
Diagram ref no 19
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135592901
The product you are viewing cross references to these numbers
OEMatch Brake Master Cylinder — Fit, Function, Confidence
OEMatch supplies a broad selection of parts for Porsche models, with a large catalogue of part numbers and extensive OE cross-references to support restorations and repairs. These replacement master cylinders are intended to restore reliable hydraulic control and a consistent pedal feel across road and track use.
Available Types
- Replacement units for classic Porsche restoration
- Replacement units for modern Porsche road models
- Units suited to road and motorsport preparation
Understanding OEMatch Brake Master Cylinder
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original brake master cylinder. OE (Original Equipment) refers to parts matching original specifications for the brake master cylinder and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM brake master cylinder engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
The brake master cylinder converts pedal pressure into hydraulic force that operates the brake calipers. It maintains even brake force distribution, supports ABS and traction control systems where fitted, and sustains a firm, predictable pedal feel when functioning correctly.
Benefits Include
- Restores safe and consistent braking performance and pedal feel
- Prevents fluid leaks and loss of hydraulic pressure
- Maintains correct brake balance across all wheels
- Constructed to resist corrosion and withstand thermal cycling
Why Brake Master Cylinder Wear and Fail
- Worn internal seals leading to pressure loss or external leaks
- Corrosion from moisture-contaminated brake fluid
- Scored or pitted cylinder bores that reduce seal integrity
- Air ingress or age-related degradation of rubber components
The Importance of Replacing with OEMatch Brake Master Cylinder
Timely replacement restores full hydraulic pressure and consistent braking response, helping to preserve control and safety for Porsche models. A serviceable master cylinder reduces the risk of spongy pedals, fluid loss and uneven brake performance while supporting systems such as ABS that depend on stable hydraulic input.
Advantages
- Manufactured to original-spec dimensions and tolerances for fit and function
- Suitable for both classic restoration and modern Porsche applications
- Supported by OEMatch’s catalogueuing and cross-references for easier part identification
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified.
