Dorman - First Stop Brake Master Cylinder P/N:M39566
Turn pedal effort into hydraulic brake pressure with the Dorman First Stop Brake Master Cylinder M93354, a new replacement with a cast iron housing, designed to mirror the original master cylinder's design, function and performance. It fits many vehicles, among them the 1992-2004 Volkswagen Sedan, the 1967-1978 Volkswagen Beetle and the 1967-1974 Volkswagen Karmann Ghia, as a direct-fit replacement for all engines on the listed applications. See the Buyer's Guide tab for the full list.
Specifications: 0.75 in bore diameter, five outlets, M10 x 1.0 rearward and secondary outlet threads, and a 1 mm primary outlet thread pitch.
Package contents: One master cylinder. The reservoir, sensor and mounting hardware are not included. Transfer or replace components as the vehicle service procedure directs, and consult the service information for the correct fasteners and whether they may be reused. Country of origin: China.
A master cylinder may need replacing if fluid is leaking at the cylinder or the pedal feels soft or slowly sinks under steady pressure. Diagnose the cause first, because brake lines, hoses or wheel cylinders can produce similar signs.
Will this 1967-1978 VW Beetle master cylinder fit my car?
It is listed for the 1967-1978 Volkswagen Beetle with all engines. It also fits the 1992-2004 Volkswagen Sedan and the 1967-1974 Volkswagen Karmann Ghia. Check the Buyer's Guide tab for your exact vehicle.
What does a brake master cylinder do?
It converts the force from the brake pedal into hydraulic pressure and sends brake fluid through the lines to the brakes at each wheel.
What are the specs of the Dorman M93354?
It has a cast iron housing, a 0.75 in bore and five outlets. The rearward and secondary outlets use M10 x 1.0 threads, and the primary outlet has a 1 mm thread pitch.
Is the reservoir included?
No. The package contains only the master cylinder. The reservoir, sensor and mounting hardware are not included, so follow the vehicle service information for those parts and for the correct fasteners.
What signs suggest the master cylinder may need replacing?
A soft or slowly sinking pedal, or fluid leaking at the cylinder, can be signs of a worn master cylinder. Diagnose first, because lines, hoses or wheel cylinders can cause similar signs.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.