Convert brake-pedal force into the hydraulic pressure your Dodge van's brakes rely on with the Dorman First Stop Brake Master Cylinder, part number M390516. It is a direct-fit replacement for many vehicles, among them the 1999-2003 Dodge Ram 1500 Van, 1999-2003 Dodge Ram 2500 Van and 1999-2003 Dodge Ram 3500 Van; see the "Vehicles it fits" section for the full list. It is precision-engineered to replicate the original master cylinder's design, function and performance on the listed applications, and it is made from new, high-quality materials.
- Precise replacement: The aluminum cylinder housing is built to match the original part's material for similar performance.
- Durable design: All rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: The unit is made entirely of new materials for quality and safety.
- Strict specifications: The cylinder is made to meet rigorous SAE International standards.
Specifications: The unit has a 1.25 in. bore diameter and two outlets. The secondary outlet thread diameter is M12 x 1.0, the rearward outlet size is M10 x 1.0, and the primary outlet thread pitch is 1 mm. The reservoir is included. A sensor and mounting hardware are not included, so consult the vehicle service information for the correct fasteners and whether the originals may be reused. Country of origin: China.
Signs a master cylinder may need replacing include a soft or slowly sinking brake pedal, brake fluid leaking at the cylinder, or a fluid level that keeps dropping. Other faults in the brake system can cause similar symptoms, so diagnose the cause first. Bleed the brakes according to the service procedure after installation.
Interchange: 83-40022 · 100-2679 · M-87022 · 13-2913 · 10-2913 · 130.67022 · 131.67022 · 355-40059
18M878 · M901090 · 13488 · 4897210AB · MC250610 · M3062 · NM3062 · MC390516 · F140285 · F141078 · MC140285 · MC141078 · 8340022 · 1002679 · M87022 · 132913 · 102913 · 13067022 · 13167022 · 35540059
This part cross-references / interchanges with the following part numbers:
18M878, 83-40022, M901090, 100-2679, M-87022, 13488, 13-2913, 10-2913, 130.67022, 131.67022, 4897210AB, MC250610, 355-40059, M3062, NM3062, MC390516, F140285, F141078, MC140285, MC141078
Frequently Asked Questions
Does the Dorman M390516 come with a reservoir?
Yes, the reservoir is included with the M390516. A sensor and mounting hardware are not included.
Which vehicles does this master cylinder fit?
It fits many vehicles, among them the 1999-2003 Dodge Ram 1500 Van, 1999-2003 Dodge Ram 2500 Van and 1999-2003 Dodge Ram 3500 Van. See the "Vehicles it fits" section for the full list.
What is the housing made of?
The cylinder housing is aluminum, built to match the original part's material. The rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.
What are the bore size and outlet specifications?
It has a 1.25 in. bore and two outlets. The secondary outlet thread diameter is M12 x 1.0, the rearward outlet size is M10 x 1.0, and the primary outlet thread pitch is 1 mm.
What are signs a master cylinder may need replacing?
Warning signs include a soft or sinking pedal, fluid leaking at the cylinder, or a steadily dropping fluid level. Other brake parts can cause similar signs, so diagnose the cause before replacing.
