Dorman M390393 brake master cylinder for the 2003 Ford E-150 and other vehicles turns pedal force into hydraulic pressure for the brakes. The Dorman brake master cylinder is engineered to follow the original unit's design, function and performance on the vans it fits.
- Part of the Dorman First Stop line
- Aluminum master cylinder with a 1.125 in bore
- All rubber components are EPDM compound that resists glycol-based brake fluid
- Made entirely of new materials
- Made to meet rigorous SAE International standards
Quick facts
- Part: Dorman M390393 brake master cylinder
- Fits: 2003 Ford E-150 and other vehicles
- Material: Aluminum
- Condition: New
A soft or sinking brake pedal, or brake fluid wetting the cylinder body, can mean the master cylinder is worn. Before replacing it, look over the cylinder, brake lines and fittings for wet spots with the engine off, since a leak elsewhere in the system can give the same pedal feel.
Fits
This brake master cylinder fits the 2003 Ford E-150, the 2003 Ford E-150 Club Wagon and the 1997-2002 Ford E-150 Econoline, and each takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 1.125 in
- Number of outlets: 3
- Rearward outlet size: M18 x 1.5
- Secondary outlet thread diameter: 9/16-18 & 3/8-24
Build and materials
- Material: Aluminum
- Reservoir: included
- Sensor: included
- Condition: New
- Country of origin: Taiwan
In the box
One brake master cylinder with its reservoir and sensor. Mounting hardware is not included, so plan on new mounting hardware, since the old pieces may not be reusable.
Frequently Asked Questions
Does the Dorman M390393 fit a 2003 Ford E-150 Club Wagon?
Yes, Dorman M390393 fits the 2003 Ford E-150 Club Wagon and the 1997-2002 Ford E-150 Econoline. For another van, find your year and model in the "Vehicles it fits" section.
Does this Dorman master cylinder come with the reservoir and sensor?
Yes. The Dorman M390393 includes the reservoir and the sensor. Mounting hardware is not included.
What bore size and outlet threads does this brake master cylinder have?
The bore diameter is 1.125 in. It has three outlets: a rearward outlet of M18 x 1.5 and secondary outlets of 9/16-18 and 3/8-24.
Are the rubber parts in this brake master cylinder made of EPDM?
Yes. All of its rubber components are EPDM compound, which resists glycol-based brake fluid.
My brake pedal slowly sinks; could this aluminum master cylinder be the cause?
It can be. A sinking pedal or fluid around the cylinder body can mean the master cylinder is worn, and if it is the cause, the M390393 replaces it.
