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Brake master cylinder. Porsche 993 C2 1995-98 ❭ 99335591000
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C2S 1994-97
Fits:
Porsche 993 C2 1995 - 1998
Diagram ref no 9
The brake master cylinder is a core hydraulic component in the braking system that converts the mechanical force from the brake pedal into hydraulic pressure. This pressure is transmitted through brake lines to the brake calipers at each wheel, enabling the vehicle to slow and stop effectively. Proper function of the master cylinder is essential for consistent brake feel and safe stopping performance.
The brake master cylinder is essential for safe operation of the brake system. Over time, internal seals and components can wear, leading to:
• Soft or spongy brake pedal feel
• Reduced hydraulic pressure
• Inconsistent stopping distances
• Visible fluid leaks under the dash or near the cylinder.
Replacing a worn or failing master cylinder with a TRW replacement restores proper hydraulic pressure, improves brake responsiveness, and enhances overall safety - especially critical on performance vehicles like the Porsche 911.
Replace this master cylinder if you notice:
• Brake pedal sinks or feels spongy
• Decreased brake performance
• Internal or external fluid leaks
• During a full brake system overhaul or restoration
• When upgrading to OEM-spec braking components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99335591000
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 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Related, superseded, cross reference or alternative numbers for comparison.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 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
The ATE brake master cylinder is a high-quality hydraulic braking component for selected Porsche 924 Turbo and 928 models. Corresponding with Porsche part number 92835501104, it is designed to replace a worn, leaking or internally failing original master cylinder and restore dependable hydraulic brake operation.
Fits:
Porsche 924 Turbo 1981 - 1982
Porsche 928/S 4.5L, 4.7L 1978 - 1983
The master cylinder converts movement from the brake pedal and servo into hydraulic pressure. This pressure is distributed through the brake lines to the calipers, allowing the vehicle to slow down in a controlled and predictable manner. As the central pressure-generating component in the braking system, its condition is critical to pedal feel and braking safety.
Manufactured by ATE, a recognised specialist in original-equipment braking technology, this replacement unit is designed to provide accurate pressure control, reliable sealing and consistent operation. ATE master cylinders are engineered for good bleeding characteristics and resistance to wear and contamination within the hydraulic system.
What This Part Does
When the brake pedal is pressed, pistons inside the master cylinder force brake fluid through separate hydraulic circuits. The resulting pressure operates the brake calipers at each wheel.
The tandem design uses two hydraulic circuits, helping retain partial braking capability if one circuit develops a fault. A serviceable master cylinder is essential for maintaining:
• Consistent brake-pedal pressure
• Predictable braking response
• Correct hydraulic pressure distribution
• Reliable operation of the front and rear brakes
• Secure containment of brake fluid
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92835501104
The product you are viewing cross references to these numbers
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 Turbo 2.5L 8V 1985-88
This Brake Master Cylinder is a Genuine Porsche Original Equipment (OE) hydraulic braking component, manufactured to Porsche’s exact factory specifications. It is the original master cylinder used in selected Porsche 924 and 944 models equipped with the ATE braking system.
Fits:
Porsche 924 GT 1980 - 1985
Porsche 924S 1986 - 1988 RHD Cars
Porsche 944 1982 - 1985 Cars with ATE brand cylinder
Porsche 944 / 944 Turbo 1985 - 1986 RHD Cars
Diagram ref no 1
The master cylinder generates and regulates hydraulic pressure when the brake pedal is applied, distributing brake fluid to the front and rear circuits. It ensures consistent brake response, predictable pedal feel, and reliable stopping performance under all driving conditions.
A worn or failing master cylinder can cause loss of hydraulic pressure, poor pedal feel, or brake fluid leakage - all of which compromise safety. Replacing it with a Genuine Porsche OE unit restores factory braking performance, system integrity, and long-term reliability while preserving vehicle originality.
When to replace:
• Brake pedal feels soft, spongy, or inconsistent
• Brake fluid leaks at the master cylinder
• Internal seal wear causing pressure loss
• Uneven or reduced braking performance
• During full brake system refurbishment or restoration
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94435501101
The product you are viewing cross references to these numbers
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