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Dorman - First Stop Brake Master Cylinder P/N:M630808
$188.99
Turn brake-pedal force into the hydraulic pressure that operates all four brakes with the Dorman - First Stop Brake Master Cylinder M630808. It drops in as a direct-fit replacement for the 2005-2010 Subaru Outback, 2007-2009 Subaru Legacy, 2008-2013 Subaru Forester, 2008-2012 Subaru Impreza, and 2013-2014 Subaru WRX and WRX STI (all engines). Dorman precision-engineers the unit to the original's design, function, and performance, and if a leaking or failing master cylinder is behind a sinking or spongy pedal, this replaces it.
- Aluminum housing: the cylinder housing is built to match the original part's casting material for similar performance.
- Durable design: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: made entirely of new materials — not remanufactured.
- Strict specifications: made to meet rigorous SAE International standards.
It has a 0.938 in bore, two outlets (M12 x 1.0 thread), and ships with a single reservoir and a sensor included. Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.
Interchange: 100-1920 · 1001920 · 13-3371 · 133371 · 11-3371 · 113371 · 11-4573 · 114573 · 11-4574 · 114574 · 130.47030 · 13047030 · 355-13026 · 35513026 · NM55377 · MC391324 · 26401AG030 · F143085 · MC143085. Manufacturer part number M630808.
This part cross-references / interchanges with the following part numbers:
100-1920, 13-3371, 11-3371, 11-4573, 11-4574, 130.47030, 355-13026, NM55377, MC391324, 26401AG030, F143085, MC143085
Frequently Asked Questions
What does this master cylinder do?
It converts the force from your brake pedal into hydraulic pressure that operates the brakes at all four wheels. If a failed or leaking master cylinder is the cause of a low or spongy pedal, this replaces it.
Which vehicles does the M630808 fit?
It's a direct-fit replacement for the 2005-2010 Subaru Outback, 2007-2009 Legacy, 2008-2013 Forester, 2008-2012 Impreza, and 2013-2014 WRX and WRX STI (all engines). See the Buyer's Guide tab to confirm your vehicle.
Does it come with a reservoir and sensor?
Yes. This master cylinder includes a single reservoir and a sensor, per the catalog specifications.
Is mounting hardware included?
No. Mounting hardware is not included. Consult the vehicle service information for the correct fasteners and whether they may be reused.
What are the bore and outlet specs?
It has a 0.938 in bore and two outlets with an M12 x 1.0 thread (1 mm pitch). The housing is made of aluminum.
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Dorman - First Stop Brake Master Cylinder P/N:M630808
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