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Dorman - First Stop Brake Master Cylinder P/N:M630807
$141.99
Convert brake-pedal effort into the hydraulic pressure that operates the brakes with the Dorman - First Stop Brake Master Cylinder M630807. It installs as a direct-fit replacement for the 2008-2009 Subaru Impreza, 2005-2009 Subaru Legacy, and 2005-2009 Subaru Outback (all engines), and is precision-engineered to match the design, function, and performance of the original unit on those applications.
- 100% new: built entirely from new materials, not remanufactured.
- Aluminum housing: constructed to match the casting material of the original part for similar performance.
- Durable design: rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- Strict specifications: made to meet rigorous SAE International standards.
This master cylinder has an aluminum bore measuring 0.938 in with two outlets sized M10 x 1.0, and it ships with the reservoir and sensor. A sinking, spongy, or slowly dropping brake pedal and visible brake-fluid leaks are common signs a master cylinder may need replacing; if a failed master cylinder is the cause, this replaces it. 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: 100-1919 · 1001919 · 13-3285 · 133285 · 11-3285 · 113285 · 130.47029 · 355-13025 · 35513025 · NM55375 · MC391323 · 26401AG010 · F143084 · MC143084. Manufacturer part number M630807.
This part cross-references / interchanges with the following part numbers:
100-1919, 13-3285, 11-3285, 130.47029, 355-13025, NM55375, MC391323, 26401AG010, F143084, MC143084
Frequently Asked Questions
What does this master cylinder do?
It converts the force you apply at the brake pedal into the hydraulic pressure that operates the brakes.
Does it fit my vehicle?
It's a direct-fit replacement for the 2008-2009 Subaru Impreza and 2005-2009 Subaru Legacy and Outback (all engines). Check the Buyer's Guide tab to confirm your specific vehicle.
Does it include a reservoir and sensor?
Yes — this unit ships with the reservoir and sensor included. Mounting hardware is not included.
What are signs my master cylinder may need replacing?
A sinking or spongy brake pedal, a pedal that slowly drops under steady pressure, or brake-fluid leaks. Diagnose the cause first, since other components can produce these symptoms.
What are the bore and outlet specs?
It has an aluminum bore measuring 0.938 in with two outlets sized M10 x 1.0.
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Dorman - First Stop Brake Master Cylinder P/N:M630807
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