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Dorman - First Stop Brake Master Cylinder P/N:M39388
$76.99
Turn brake-pedal pressure into the hydraulic force that works your brakes with the Dorman - First Stop Brake Master Cylinder M39388. It drops in as a direct-fit replacement for the 1983-1985 Ford Ranger [All] and the 1984-1985 Ford Bronco II [All], and it's precision-engineered to match the design, function, and performance of the original master cylinder on those applications.
- 100% new: made entirely of new materials, not remanufactured.
- Cast iron housing: the cylinder housing is built to match the casting material of the original part for similar performance.
- Fluid-resistant seals: all 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, with two outlets, a 0.938 in bore, and a 7/16-24 secondary outlet thread.
The reservoir is included; a sensor and mounting hardware are not. Consult the vehicle service information for the correct fasteners and whether they may be reused. Signs the original may need replacing include a sinking or soft brake pedal or fluid weeping at the cylinder body; diagnose the cause first, and if the master cylinder is at fault, this unit replaces it. Country of origin: China.
Interchange: 18M205 · 783-42028 · 78342028 · 83-42028 · 8342028 · M900405 · 100-2469 · 1002469 · M-85028 · M85028 · 11930 · 13-1930 · 131930 · 10-1930 · 101930 · 130.65028 · 131.65028 · MC251820 · 355-54148 · 35554148 · E3TZ2140A · M1930 · NM1930 · 2539388 · MC39388 · F106433 · MC106433 · Manufacturer part number M39388.
This part cross-references / interchanges with the following part numbers:
18M205, 783-42028, 83-42028, M900405, 100-2469, M-85028, 11930, 13-1930, 10-1930, 130.65028, 131.65028, MC251820, 355-54148, E3TZ2140A, M1930, NM1930, 2539388, MC39388, F106433, MC106433
Frequently Asked Questions
What is the Dorman M39388?
It's a brake master cylinder that converts brake-pedal force into hydraulic pressure, sending it through its two outlets to the brake system. It is 100% new, not remanufactured.
What vehicles does it fit?
It's a direct-fit replacement for the 1983-1985 Ford Ranger [All] and the 1984-1985 Ford Bronco II [All]. Check the Buyer's Guide tab to confirm the match for your vehicle.
Does it come with a reservoir?
Yes, the reservoir is included. A sensor is not included, and mounting hardware is not included.
What is it made of?
The cylinder housing is cast iron, built to match the original's casting material, and the rubber components use a high-quality EPDM compound resistant to glycol-based brake fluid.
What are signs mine may need replacing?
A sinking or soft brake pedal, or brake fluid leaking at the cylinder body, can be signs. Diagnose the cause first; if the master cylinder is at fault, this M39388 replaces it.
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Dorman - First Stop Brake Master Cylinder P/N:M39388
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