7mm x 17mm Master Cylinder Grommet - Beetle -1968-71, Bay With Servo Brakes, All G1

This brake master cylinder plug is designed to seal the brake fluid feed pipe where it connects to the master cylinder, ensuring a secure and leak-free braking system. With an inner diameter of 7mm and an outer diameter of 17mm, it provides the correct interference fit required to maintain hydraulic pressure and prevent fluid loss.

The master cylinder relies on a constant supply of brake fluid from the reservoir via feed pipes. This plug forms a critical seal at that connection point, preventing air ingress and fluid leaks. A worn or hardened plug can lead to fluid seepage, reduced braking efficiency, or air entering the system—resulting in a spongy pedal feel. Replacing this small but essential component helps maintain proper brake performance and safety.

Manufactured from durable, brake-fluid-resistant material, this plug is suitable for both restoration work and routine maintenance. It is sold individually, allowing you to replace only what is required.

Related Parts (Recommended)

• Brake master cylinder
• Brake fluid reservoir and feed hoses
• Brake fluid (DOT specification as required)
• Hose clips and seals

To Fit

Aircooled VW

• VW Beetle Saloon & Cabriolet – 1966–1971
• VW T2 Split Bus – 1966–1967
• VW T2 Baywindow – 1968–1971
• VW Karmann Ghia – 1966–1971
• VW Type 3 (Fastback, Squareback, Notchback) – 1966–1971

Watercooled VW

• VW Golf Mk1 Hatchback & Cabriolet – 1974–1993 – 1.1, 1.3, 1.5, 1.6, 1.8 petrol / 1.5, 1.6 diesel
• VW Jetta Mk1 – 1978–1984 – 1.1, 1.3, 1.5, 1.6 petrol / 1.6 diesel
• VW Scirocco Mk1 & Mk2 – 1974–1992 – 1.1–1.8 petrol
• VW Caddy Mk1 – 1983–1992
• VW Polo Mk1/Mk2 – 1975–1985

Porsche

• Porsche 924 – 1975–1989 – 2.0 petrol (125–209bhp)