Dorman M630766 brake master cylinder for the 2006-2009 Chevrolet Optra and other vehicles turns pedal force into hydraulic pressure for the brakes. Its design, function and performance follow the original master cylinder on the models it fits.
- Master cylinder made of aluminum
- Rubber components made of EPDM compound that resists glycol-based brake fluid
- Made entirely of new materials
- Built to meet rigorous SAE International standards
Quick facts
- Part: Dorman M630766 brake master cylinder
- Fits: 2006-2009 Chevrolet Optra and other vehicles
- Material: Aluminum
- Condition: New
Master cylinder trouble can show up as a soft or sinking brake pedal, or as brake fluid around the cylinder. A leaking brake hose or caliper, air in the lines or a worn brake booster can give a soft pedal too, so find which one is at fault before you buy.
Fits
This master cylinder fits the 2006-2009 Chevrolet Optra, the 2007-2008 Suzuki Forenza and the 2007-2008 Suzuki Reno, and each of them takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 0.9375 in
- Mounting holes: 2
- Number of outlets: 2
- Rearward outlet size: M10 x 1.0
- Secondary outlet thread diameter: M12 x 1.0
- Primary outlet thread pitch: 1 mm
Build and materials
- Reservoir type: Single
- Material: Aluminum
- Condition: New
- Country of origin: Taiwan
In the box
One master cylinder and one bleeder kit. Mounting hardware, a mounting bracket and a push rod are not included, so plan on new mounting hardware, since the old pieces may not be reusable.
Interchange: 100-4094 · 11-3914 · 130.48032 · 355-01020
96418852 · NM55425 · 5120085Z30 · F144404 · MC144404 · MWMMC900100
This part cross-references / interchanges with the following part numbers:
100-4094, 11-3914, 130.48032, 355-01020, 96418852, NM55425, 5120085Z30, F144404, MC144404, MWMMC900100
Frequently Asked Questions
Is this Dorman brake master cylinder the right one for the 2007-2008 Suzuki Forenza?
Yes. Dorman M630766 is listed for the 2007-2008 Suzuki Forenza, which takes one master cylinder.
Does this Dorman master cylinder come with a bleeder kit?
Yes. Dorman M630766 comes with a bleeder kit. Mounting hardware, a mounting bracket and a push rod are not included.
What size are the outlet threads on this brake master cylinder?
The rearward outlet is M10 x 1.0 and the secondary outlet thread diameter is M12 x 1.0. The primary outlet thread pitch is 1 mm.
Can the rubber parts in this master cylinder handle glycol-based brake fluid?
Yes. All of its rubber components are made of EPDM compound for resistance to glycol-based brake fluid.
Can a sinking brake pedal or fluid at the cylinder mean this master cylinder is failing?
They can. A pedal that sinks or fluid around the cylinder may point to it, and brakes affect stopping, so have a shop inspect them promptly.
