Dorman M630431 brake master cylinder for the 2003-2005 Mazda 6 turns pedal force into hydraulic pressure for the brakes. This Dorman brake master cylinder is engineered to follow the original unit's design, function and performance.
- Part of the Dorman First Stop line
- All rubber components use an EPDM compound that resists glycol-based brake fluid
- Made entirely of new materials
- Built to meet SAE International standards
Quick facts
- Part: Dorman M630431 brake master cylinder
- Fits: 2003-2005 Mazda 6
- Material: Aluminum
- Condition: New
A brake pedal that sinks or feels soft, or brake fluid leaking around the cylinder, can mean the master cylinder is wearing out. Brake lines, a caliper or the brake booster can be behind these signs too, so find the cause before buying a replacement.
Fits
This master cylinder fits the 2003-2005 Mazda 6, and the car takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 0.813 in
- Number of outlets: 2
- Rear outlet size: M10 x 1.0
- Secondary outlet thread diameter: M10 x 1.0
- Primary outlet thread pitch: 1 mm
Build and materials
- Material: Aluminum
- Rubber components: EPDM compound
- Condition: New
- Country of origin: Taiwan
In the box
One master cylinder. The reservoir, mounting hardware and sensor are not included, so plan on new mounting hardware rather than reusing the old.
Interchange: 100-1756 · 13-3097M · 11-3097 · 130.45217 · 130.45218 · 355-80044 · 355-80045
M55312 · NM55312 · NM55312A · GJ6F4340Z · GJ6F4340ZA · GJ6F4340ZR0A · GJ6M4340Z · GJ6N4340Z · GJ6N4340ZA · MC391051 · MC391052 · F142447 · F142448 · F900081 · MC142447 · MC142448 · MWMMC900081
This part cross-references / interchanges with the following part numbers:
100-1756, 13-3097M, 11-3097, 130.45217, 130.45218, 355-80044, 355-80045, M55312, NM55312, NM55312A, GJ6F4340Z, GJ6F4340ZA, GJ6F4340ZR0A, GJ6M4340Z, GJ6N4340Z, GJ6N4340ZA, MC391051, MC391052, F142447, F142448, F900081, MC142447, MC142448, MWMMC900081
Frequently Asked Questions
Is this the right master cylinder for the 2003-2005 Mazda 6?
Yes. Dorman M630431 fits the 2003-2005 Mazda 6, and the car takes one.
Is this Dorman master cylinder aluminum?
Yes. The body of this master cylinder is aluminum, and all of its rubber components are an EPDM compound that resists glycol-based brake fluid.
Does the M630431 include a reservoir or mounting hardware?
No. Dorman M630431 is the master cylinder alone; the reservoir, mounting hardware and sensor are not included.
What thread size are the outlets on this master cylinder?
The rear and secondary outlets are M10 x 1.0, and the primary outlet thread pitch is 1 mm. The bore diameter is 0.813 in.
What standard is this master cylinder made to meet?
Dorman M630431 is made to meet SAE International standards. It is built entirely of new materials.
