Dorman - First Stop Brake Master Cylinder P/N:M630623
Turn pedal effort into the hydraulic pressure your brakes rely on with this Subaru Outback brake master cylinder, the Dorman First Stop M630802. It is a direct-fit replacement for the 2010-2014 Subaru Outback and the 2010-2015 Subaru Legacy (all engines), precision-engineered to replicate the original master cylinder's design, function and performance on those applications. Its new, high-quality materials are intended to make it a safe, durable replacement.
Specifications: aluminum material; 0.938 in bore diameter; 2 outlets; M12 x 1.0 rearward outlet size; M12 x 1.0 secondary outlet thread diameter; 1 mm primary outlet thread pitch; single reservoir included; sensor included; mounting hardware not included. Country of origin: Taiwan.
Signs this part may need replacing include a spongy or slowly sinking brake pedal, fluid leaking at the master cylinder, or a falling brake fluid level. Other brake components can cause similar symptoms, so diagnose the cause first. If the master cylinder is at fault, this Subaru Legacy master cylinder replaces it. Follow the vehicle service information for installation, including bleeding the brake system.
Interchange: 100-2945 · 13-4401 · 11-4401 · 130.47032 · 355-13028
1002945 · 134401 · 114401 · 13047032 · 35513028 · NM55470 · MC391418 · 26401AJ000 · 26449AJ000
This part cross-references / interchanges with the following part numbers:
Will this Subaru Outback master cylinder fit my vehicle?
Dorman M630802 is listed for the 2010-2014 Subaru Outback and the 2010-2015 Subaru Legacy, all engines. The Buyer's Guide tab shows the full application details.
Does it come with a reservoir and sensor?
Yes. It includes a single reservoir and a sensor. Mounting hardware is not included.
What are signs a brake master cylinder may need replacing?
Common signs include a spongy or sinking brake pedal, fluid leaking at the master cylinder, or a dropping fluid level. Other brake parts can cause similar symptoms, so diagnose first.
Is it compatible with glycol-based brake fluid?
Its rubber components are made of a high-quality EPDM compound for resistance to glycol-based brake fluid. Use the fluid type specified in your vehicle's service information.
What are the bore and outlet specifications?
The master cylinder is aluminum, with a 0.938 in bore diameter and 2 outlets. Its rearward outlet size and secondary outlet thread are both M12 x 1.0, and the primary outlet thread pitch is 1 mm.
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.