Dorman M630756 brake master cylinder for the 2007-2013 Mazda 3 turns pedal force into hydraulic pressure for the brakes. The Dorman brake master cylinder is engineered to match the design and performance of the original on these model years.
- Aluminum housing constructed to match the casting material of the part it replaces
- All rubber components are EPDM compound, which resists glycol-based brake fluid
- Made entirely of new materials
- Made to meet SAE International standards
- Two outlets with M12 X 1.0 threads
Quick facts
- Part: Dorman M630756 brake master cylinder
- Fits: 2007-2013 Mazda 3
- Material: Aluminum
- Condition: New
A soft or sinking brake pedal, or fluid around the cylinder body, can mean a master cylinder is worn. Before you replace it, rule out leaks at the lines, hoses or calipers, and air in the system, since those can give a similar pedal feel.
Fits
It is a brake master cylinder replacement for the 2007-2013 Mazda 3, and each car takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 1 in
- Number of outlets: 2
- Rearward outlet size: M12 X 1.0
- Secondary outlet thread diameter: M12 X 1.0
- Primary outlet thread pitch: 1 mm
Build and materials
- Material: Aluminum
- Rubber components: EPDM compound
- Condition: New
- Country of origin: China
In the box
One master cylinder. The reservoir, sensor and mounting hardware are not included, so plan on new fasteners.
Interchange: 100-1796 · 13-3869 · 11-3869 · 130.45425 · 355-80078
NM55506 · B3YF4340Z · B3YF4340ZA · MC391377 · F143489 · MC143489
This part cross-references / interchanges with the following part numbers:
100-1796, 13-3869, 11-3869, 130.45425, 355-80078, NM55506, B3YF4340Z, B3YF4340ZA, MC391377, F143489, MC143489
Frequently Asked Questions
Is this the right 2007-2013 Mazda 3 master cylinder?
Yes. Dorman M630756 is listed for the 2007-2013 Mazda 3, and each car takes one.
Does this Dorman master cylinder come with a reservoir?
No. Dorman M630756 is the master cylinder only; the reservoir, sensor and mounting hardware are not included.
What bore size and outlet threads does this brake master cylinder have?
The bore is 1 inch and the cylinder has two outlets. The rearward and secondary outlets are M12 X 1.0, with a 1 mm primary outlet thread pitch.
What can a sinking pedal mean on a brake master cylinder like this?
A sinking or soft pedal, or fluid around the cylinder body, can mean the cylinder is worn. Have a shop inspect the brakes promptly.
Will the rubber parts in this master cylinder handle glycol-based brake fluid?
Yes. All rubber components are made of an EPDM compound for resistance to glycol-based brake fluid.
