Dorman - First Stop Brake Master Cylinder P/N:M630794
Dorman M630673 brake master cylinder for the 2009-2010 Hyundai Elantra turns pedal force into hydraulic pressure for the brakes.
A soft or sinking brake pedal, fluid around the cylinder or a brake warning light can be signs of a failing master cylinder, but a leak elsewhere in the brake system can feel the same at the pedal. With the engine off, look at the reservoir level and for wet spots at the cylinder and brake lines before you buy a replacement; a shop can test hydraulic pressure.
This master cylinder is a direct-fit replacement for the 2009-2010 Hyundai Elantra, which takes one.
Fit and size
Build and materials
One master cylinder with its reservoir and sensor. Mounting hardware is not included, and old fasteners may not be reusable, so plan on new ones.
Interchange: 100-3720 · 13-4651 · 11-4651
585102L100 · NM55669 · MC391244
This part cross-references / interchanges with the following part numbers:
Is this a master cylinder for the 2009-2010 Hyundai Elantra?
Yes. Dorman M630673 fits the 2009-2010 Hyundai Elantra, and that car takes one.
Does this Dorman master cylinder come with the reservoir and sensor?
Yes. Dorman M630673 includes its reservoir and sensor. Mounting hardware is not included, and the old fasteners may not be reusable, so plan on new ones.
What is this brake master cylinder made of?
The housing is aluminum. All rubber components are EPDM compound, which resists glycol-based brake fluid.
What are the outlet thread sizes on this master cylinder?
The rearward outlet is M10 x 1.0, the secondary outlet thread diameter is M10 x 1.0 and the primary outlet thread pitch is 1 mm. It has four outlets and a 0.813 in bore.
What standard is this brake master cylinder made to meet?
It is made to meet rigorous SAE International standards. Dorman M630673 is built entirely of new materials.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.