Dorman - First Stop Brake Master Cylinder P/N:M39634

Turn firm pedal pressure into the hydraulic force that works your brakes with the Dorman - First Stop Brake Master Cylinder M39634. It drops in as a direct-fit replacement for the listed applications, including the 1987-1996 Ford Bronco, 1988-1996 Ford E-150 Econoline and E-150 Econoline Club Wagon, 1987-1991 Ford E-250 Econoline and E-250 Econoline Club Wagon, 1987-2003 Ford F-150, 2004 Ford F-150 Heritage, 1987-1993 Ford F-250, and 1997-2003 Ford Lobo (all engines) — see the Buyer's Guide tab for the full list.

• 100% new: built entirely from new materials rather than remanufactured.
• Aluminum housing: constructed to match the casting material of the original part for similar performance.
• EPDM seals: rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
• Built to spec: made to meet rigorous SAE International standards.

This unit has two outlets, a 1.063 in bore diameter and an M18 x 1.5 rearward outlet, and includes a reservoir and a sensor. Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Signs the original master cylinder may need replacing include a brake pedal that slowly sinks under steady pressure or feels spongy; diagnose the cause before replacing, as these symptoms can have other sources. Country of origin: China.

Manufacturer part number M39634.