Dorman M630428 brake master cylinder for the 2004-2008 Mazda 3 converts pedal force into hydraulic pressure for the brakes. Its design follows the original master cylinder's function.
- Aluminum cylinder housing built to match the casting material of the original part for similar performance
- All rubber components use EPDM compound that resists glycol-based brake fluid
- Made entirely of new materials
- Made to meet rigorous SAE International standards
Quick facts
- Part: Dorman M630428 brake master cylinder
- Fits: 2004-2008 Mazda 3
- Material: Aluminum
- Condition: New
A brake pedal that feels soft or sinks slowly, fluid around the cylinder or a brake warning light can mean the master cylinder is failing. Worn pads, a leaking caliper or brake line, or air in the lines can be behind these signs too, so find the cause before buying.
Fits
This master cylinder is a direct-fit replacement for the 2004-2008 Mazda 3.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 1 in
- Number of outlets: 2
- Rearward 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 brake master cylinder with its reservoir and sensor. This listing holds one cylinder, and the 2004-2008 Mazda 3 takes one. Mounting hardware is not included, so plan on new hardware rather than reusing the old.
Interchange: 100-1794 · 13-3109 · 11-3109 · 130.45423 · 355-80076
M55313 · BNYR4340Z · BNYR4340ZA · BPYS4340ZA · BPYS4340ZR0B · MR527633 · MC391048 · F142627 · MC142627 · MWMMC900077
This part cross-references / interchanges with the following part numbers:
100-1794, 13-3109, 11-3109, 130.45423, 355-80076, M55313, BNYR4340Z, BNYR4340ZA, BPYS4340ZA, BPYS4340ZR0B, MR527633, MC391048, F142627, MC142627, MWMMC900077
Frequently Asked Questions
Is this the right master cylinder for the 2004-2008 Mazda 3?
Yes. Dorman M630428 is a direct-fit replacement for the 2004-2008 Mazda 3, and that car takes one master cylinder.
Does the Dorman M630428 master cylinder come with the reservoir and sensor?
Yes, the reservoir and sensor are included with the cylinder. Mounting hardware is not included, so plan on new hardware.
What brake fluid are the rubber parts in this master cylinder made for?
All rubber components are made of EPDM compound, which resists glycol-based brake fluid.
What are the outlet thread size and bore of this master cylinder?
Dorman M630428 has two outlets with an M10 x 1.0 thread, a 1 in bore and a 1 mm thread pitch on the primary outlet.
Is this aluminum master cylinder made to SAE standards?
Yes. The cylinder material is aluminum, and the part is made to meet rigorous SAE International standards.
