Dorman - First Stop Brake Master Cylinder P/N:M39704
Turn every push of the pedal into brake-line pressure with the Dorman First Stop Brake Master Cylinder M93065, a new master cylinder that installs as a direct-fit replacement for the 1954-1964 Volkswagen Beetle and the 1961-1964 Volkswagen Karmann Ghia. It is precision-engineered to replicate the design, function and performance of the original master cylinder and is built from new, high-quality materials for a safe, durable replacement.
Specifications: 0.75-inch bore, three outlets and an M10 x 1.0 rearward outlet. The package contains the master cylinder only. The reservoir, sensor and mounting hardware are not included. Country of origin: China.
A soft or sinking pedal, or fluid seeping around the unit, may be a sign that the master cylinder needs replacing. Diagnose the brake system first, and bleed the brakes after installation according to the vehicle service procedure.
Interchange: 783-94100 · 83-94100 · 100-1118 · M-20100 · 072-8024 · 11-35125 · 130.33500 · 131.33500 · 355-74057
78394100 · 8394100 · 1001118 · M20100 · 0728024 · 1135125 · 13033500 · 13133500 · 35574057 · M900056 · 11565 · MC512260 · 5472929 · 93065 · MC35125 · 113611021 · 113611021C · F142570 · MC142570
This part cross-references / interchanges with the following part numbers:
Will this 1954-1964 VW Beetle brake master cylinder also fit a 1961-1964 Volkswagen Karmann Ghia?
Yes. It is listed for the 1961-1964 Volkswagen Karmann Ghia as well as the 1954-1964 Volkswagen Beetle. The Buyer's Guide tab has the complete fitment chart.
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 wheel brakes. This unit has three outlets.
Is a reservoir included?
No. The package contains the master cylinder only. The reservoir, sensor and mounting hardware are not included, so consult the vehicle service information for the correct fasteners and whether they may be reused.
What are the key specifications?
It has a 0.75-inch bore, three outlets and an M10 x 1.0 rearward outlet. The housing is cast iron, and the rubber components are EPDM for resistance to glycol-based brake fluid.
What signs suggest a master cylinder may need replacing?
A soft or slowly sinking brake pedal, or brake fluid leaking at the cylinder, may be a sign of a worn master cylinder, though other brake faults can cause similar symptoms. Diagnose first, and bleed the brakes after installation.
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.