Dorman - First Stop Brake Master Cylinder P/N:M39228
Dorman M630359 brake master cylinder for the 2002-2004 Subaru Outback and other vehicles turns pedal force into hydraulic pressure for the brakes.
A soft or sinking pedal, fluid around the master cylinder or a brake warning light can mean this part is worn, though a leaking brake line or a worn caliper can be behind the same signs, so trace the cause before replacing anything.
It fits the 2002-2004 Subaru Outback and the 2002-2003 Subaru Legacy, with one master cylinder per car.
Fit and size
Build and materials
One master cylinder with its reservoir and cap, and a bleeder kit. Mounting hardware, a mounting bracket and a push rod are not included.
Interchange: 100-1918 · 11-2873 · 11-3066 · 11-3164 · 130.47028 · 355-13024
M55272 · MC390938 · 26401AE010 · 26401AE011 · F142352 · MC142352
This part cross-references / interchanges with the following part numbers:
Is this Subaru Outback brake master cylinder correct for the 2002-2004 Outback?
Yes. Dorman M630359 fits the 2002-2004 Subaru Outback, and each one takes a single master cylinder.
Can I use this Subaru Legacy brake master cylinder on a 2002-2003 model?
Yes. Dorman M630359 fits the 2002-2003 Subaru Legacy, and the car takes one master cylinder.
What is in the box with this Dorman master cylinder?
The box holds the master cylinder with its reservoir and cap, plus a bleeder kit. Mounting hardware, a mounting bracket and a push rod are not included.
What is the bore size of this Dorman brake master cylinder?
The bore diameter is 1.0625 inches. The aluminum body has two outlets, and the rearward and secondary outlets use M12 x 1.0 threads.
What brake fluid are the rubber parts in this master cylinder made for?
All of its rubber components are made of EPDM compound, which resists glycol-based brake fluid.
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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.