Dorman M390400 brake master cylinder for the 1998-2000 Ford Explorer and other vehicles turns pedal force into hydraulic pressure for the brakes. This Dorman brake master cylinder follows the design, function and performance of the original on the vehicles it fits.
- Dorman First Stop line, made entirely of new materials
- Aluminum housing with three outlets
- EPDM rubber components that resist glycol-based brake fluid
- Made to meet SAE International standards
Quick facts
- Part: Dorman M390400 brake master cylinder
- Fits: 1998-2000 Ford Explorer and other vehicles
- Material: Aluminum
- Condition: New
A soft or sinking brake pedal, or brake fluid leaking around the unit, can mean the master cylinder is wearing out. These signs alone do not prove this part is the problem, since a leaking brake line can cause them too.
Fits
The 1998-2000 Ford Explorer, the 1998-2000 Ford Ranger and the 2001-2002 Ford Explorer Sport all take this master cylinder, along with other vehicles, at one master cylinder per vehicle. If your vehicle is not one of these, look up its year and model in the "Vehicles it fits" section.
Specifications
Fit and size
- Bore diameter: 1.063 in
- Number of outlets: 3
- Rearward outlet size: M18 x 1.5
- Secondary outlet thread diameter: M10 x 1.0
- Primary outlet thread pitch: 1 mm
- Quantity per vehicle: 1
Build and materials
- Material: Aluminum
- Condition: New
- Country of origin: Taiwan
In the box
One brake master cylinder with its reservoir and a sensor. Mounting hardware is not included, so plan on new mounting hardware, because the old pieces may not be reusable.
Interchange: 83-42055 · 100-2508 · M-85055 · 072-9487 · 13-2863 · 10-2863 · 130.65055 · 131.65055 · 355-54174
18M818 · M901053 · 13304 · MC250990 · F87Z2140BA · F87Z2140BC · M3070 · NM3070 · ZZP143400 · MC390400 · F139953 · F139954 · MC139954
This part cross-references / interchanges with the following part numbers:
18M818, 83-42055, M901053, 100-2508, M-85055, 072-9487, 13304, 13-2863, 10-2863, 130.65055, 131.65055, MC250990, 355-54174, F87Z2140BA, F87Z2140BC, M3070, NM3070, ZZP143400, MC390400, F139953, F139954, MC139954
Frequently Asked Questions
Is M390400 the right 1998-2000 Ford Ranger brake master cylinder?
Yes. Dorman M390400 fits the 1998-2000 Ford Ranger, which takes one master cylinder.
Is this a 1998-2000 Ford Explorer master cylinder, and does it fit the 2001-2002 Ford Explorer Sport too?
Yes. Dorman M390400 fits the 1998-2000 Ford Explorer and the 2001-2002 Ford Explorer Sport, at one per vehicle.
Does this Dorman master cylinder come with the reservoir?
Yes. The box holds one master cylinder with its reservoir and a sensor. Mounting hardware is not included.
What are the rubber parts in this brake master cylinder made of?
All the rubber components are an EPDM compound that resists glycol-based brake fluid. The housing is aluminum.
What are the bore and outlet sizes on this master cylinder?
The bore is 1.063 in and the rearward outlet is M18 x 1.5. The secondary outlet thread is M10 x 1.0, and the primary outlet thread pitch is 1 mm.
