Turn pedal effort into the hydraulic pressure your brakes rely on with the Dorman First Stop 2005-2008 Ford Mustang master cylinder, part number M630308. It is a direct-fit replacement for the 2005-2008 Ford Mustang with all engines. Dorman precision-engineers it to match the original master cylinder's design, function, and performance on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.
- Precise replacement: The aluminum cylinder housing is constructed to match the casting material of the original part, intended to deliver similar performance.
- Durable design: Every rubber component is made from a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: Made entirely from new materials for the highest quality and safety.
- Strict specifications: Built to meet rigorous SAE International standards.
If a worn or leaking master cylinder is the cause of a soft or sinking brake pedal, this unit replaces it. Diagnose the brake system before replacing parts.
Specifications: bore diameter 1.063 in; two outlets; rearward outlet size M12 x 1.0; secondary outlet thread diameter M12 x 1.0; primary outlet thread pitch 1 mm. The package contains one master cylinder. The reservoir and sensor are not included, so transfer or replace them as directed by the vehicle service procedure. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.
Interchange: 100-2196 · 13-3274 · 10-3274 · 130.61127 · 355-54090 · BRMC-9
1002196 · 133274 · 103274 · 13061127 · 35554090 · BRMC9 · 4R3Z2140AA · 6R3Z2140AA · M4106 · NM4106 · MC390958 · F142399 · MC142399
Frequently Asked Questions
Does this master cylinder include a reservoir?
What vehicles does Dorman M630308 fit?
It is listed for the 2005-2008 Ford Mustang with all engines. The listed application uses one master cylinder.
What are the bore and outlet specifications?
The bore diameter is 1.063 in, and it has two outlets. The rearward outlet size and the secondary outlet thread diameter are both M12 x 1.0, and the primary outlet thread pitch is 1 mm.
What are the rubber components made of?
All rubber components use a high-quality EPDM compound that resists glycol-based brake fluid. Use the brake fluid specified for your vehicle.
What are signs a master cylinder may need replacing?
Common signs include a soft or sinking brake pedal, fluid leaking around the cylinder, or a low brake fluid warning. These signs can have other causes, so diagnose the brake system before you replace it.
This part cross-references / interchanges with the following part numbers:
100-2196, 13-3274, 10-3274, 130.61127, 355-54090, 4R3Z2140AA, 6R3Z2140AA, M4106, NM4106, BRMC-9, MC390958, F142399, MC142399
