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91435501200/1
Product Information
Product Information
Brake Master Cylinder,  Ø 17,05mm
This OE match brake master cylinder is a direct replacement for the original Porsche component fitted to 914-4 models produced between 1970 and 1976. Manufactured to factory specifications, it features a 17.05mm bore diameter, ensuring the correct hydraulic pressure and pedal feel for the original braking system.

Fits:
Porsche 914-4 1970 - 1976

Diagram ref no

The brake master cylinder converts mechanical pedal movement into hydraulic pressure, allowing brake fluid to activate the brake calipers. It ensures consistent braking force distribution for safe and controlled stopping performance.

Function
•  Converts brake pedal force into hydraulic pressure
•  Distributes brake fluid to brake calipers
•  Maintains consistent braking response and pedal feel
•  Supports safe and controlled stopping performance
•  Operates as the central hydraulic component of the braking system

Brake master cylinders wear internally over time due to seal deterioration, moisture contamination, and repeated hydraulic pressure cycles. A failing master cylinder can lead to poor braking performance, fluid leaks, or loss of pedal pressure. Replacing it restores safe braking operation, proper hydraulic pressure, and reliable pedal feel.

When to replace
  Soft or spongy brake pedal
  Brake fluid leakage around master cylinder
  Reduced braking efficiency or inconsistent pedal feel
  Internal seal failure causing pressure loss
  During complete brake system restoration or overhaul

Related reference numbers
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91435501200
91435501200

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