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- Porsche 964 (911) C2 1989-93
Brake Master Cylinder
Restore the braking performance and safety of your Porsche
with this OE Match Brake Master Cylinder. Manufactured to
original equipment specifications, this premium-quality replacement master
cylinder delivers precise hydraulic pressure, consistent brake pedal feel and
dependable braking performance for everyday driving and spirited road use.
Fits:
- Porsche 964 (911) C2 1989-93
Diagram ref no 9
The brake master cylinder is the heart of the hydraulic braking system. Every time you press the brake pedal, it converts mechanical force into hydraulic pressure, distributing brake fluid to each brake caliper. A worn or failing master cylinder can reduce braking efficiency, increase stopping distances and compromise vehicle safety, making timely replacement essential.
Manufactured using precision-machined internal components and high-quality seals, this OE Match brake master cylinder is engineered for long service life, excellent reliability and direct replacement fitment.
What Does the Brake Master Cylinder Do?
The brake master cylinder generates and distributes hydraulic pressure throughout the braking system.
Its primary functions include:
- Converting brake pedal movement into hydraulic pressure.
- Delivering brake fluid evenly to all four brake calipers.
- Maintaining consistent brake pedal feel.
- Providing balanced braking performance.
- Supporting the operation of the ABS braking system.
- Ensuring safe and predictable stopping performance.
Without a correctly functioning master cylinder, the braking system cannot operate effectively.
Why Does the Brake Master Cylinder Fail?
Over time, the internal components are subjected to constant
hydraulic pressure and brake fluid exposure. Common causes of failure include:
- Wear of the internal piston seals.
- Contaminated or degraded brake fluid.
- Corrosion inside the cylinder bore.
- Moisture absorption in the brake fluid.
- High mileage and age-related wear.
- Damage caused by neglected brake fluid changes.
Regular brake fluid replacement helps prolong the life of the master cylinder and the entire braking system.
Symptoms of a Failing Brake Master Cylinder
Typical warning signs include:
- Soft or spongy brake pedal.
- Brake pedal slowly sinking under constant pressure.
- Reduced braking performance.
- Internal hydraulic pressure loss.
- Brake fluid leaks around the master cylinder.
- Inconsistent pedal feel.
- Increased stopping distances.
- Brake warning light illumination (in some cases).
If any of these symptoms are present, the master cylinder should be inspected and replaced immediately if found to be faulty.
When Should the Brake Master Cylinder Be Replaced?
Replacement is recommended when:
- Internal seals begin to fail.
- Hydraulic pressure cannot be maintained.
- Brake fluid leakage is detected.
- The cylinder bore becomes corroded.
- Carrying out a complete brake system restoration.
- Replacing ageing hydraulic braking components.
- Brake performance deteriorates despite correctly functioning calipers and hoses.
Replacing the master cylinder restores braking confidence and helps maintain the original performance of your Porsche.
Please note if the fitting instructions are not followed this will damage the unit.
For Installation Instructions please CLICK HERE
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96435501503
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- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
Fits:
Porsche 997 3.8L C2S
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99735591011
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Fits:
Porsche 911 1977-89
Porsche 911 (930) Turbo 1975-89
Porsche 924 1976-85
Porsche 924 S 1986-88
Porsche 928 1978-85
Porsche 944 1982-90
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
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251611243
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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
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L040
The product you are viewing cross references to these numbers