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Dorman - First Stop Brake Master Cylinder P/N:M630809
$262.99
Turn brake-pedal effort into the hydraulic pressure that operates your brake circuits with the Dorman - First Stop Brake Master Cylinder M630809. It's precision-engineered to the original master cylinder's design, function, and performance for the listed MINI applications, dropping in as a direct-fit replacement for the 2009-2018 MINI Cooper (All), 2011-2018 MINI Cooper Countryman (All), 2013-2016 MINI Cooper Paceman (All), and 2016-2018 MINI Cooper Clubman (All).
- Precise replacement: the cylinder housing is built to match the casting material of the original part 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, and made to meet SAE International standards.
- Built specs: aluminum master cylinder with a 0.938 in bore diameter and two outlets; the rearward/secondary outlet is M12 x 1.0 with a 1 mm thread pitch.
The mounting hardware, reservoir, and sensor are not included — the package contains the master cylinder only; consult the vehicle service information for the correct fasteners and whether they may be reused. If a failed master cylinder is the cause of a sinking or spongy pedal, this unit replaces it. Country of origin: Taiwan.
Interchange: 100-2954 · 1002954 · 34336772855 · 34336786585 · 13-4205 · 134205 · 11-4205 · 114205 · 130.34202 · 355-32002 · 35532002 · NM55461 · MC391366 · F143560 · MC143560
Manufacturer part number M630809.
This part cross-references / interchanges with the following part numbers:
100-2954, 34336772855, 34336786585, 13-4205, 11-4205, 130.34202, 355-32002, NM55461, MC391366, F143560, MC143560
Frequently Asked Questions
What does the brake master cylinder do?
It converts brake-pedal force into the hydraulic pressure sent to the brake circuits. This Dorman M630809 is a 100% new, direct-fit replacement for the listed MINI models.
Which vehicles does the M630809 fit?
It's a direct-fit replacement for the 2009-2018 MINI Cooper, 2011-2018 Cooper Countryman, 2013-2016 Cooper Paceman, and 2016-2018 Cooper Clubman (All). Check the Buyer's Guide tab to confirm your vehicle.
Does it include a reservoir, sensor, or mounting hardware?
No. The reservoir, sensor, and mounting hardware are not included; the package contains the master cylinder only. Consult the vehicle service information for the correct fasteners and whether they may be reused.
What are its specifications?
An aluminum housing with a 0.938 in bore and two outlets; the rearward/secondary outlet is M12 x 1.0 with a 1 mm thread pitch. Rubber components use an EPDM compound for glycol-based brake-fluid resistance.
What are signs my master cylinder may need replacing?
A sinking or spongy pedal, a low pedal, or fluid seeping at the cylinder can be signs. Diagnose the cause first; if the master cylinder is at fault, this M630809 replaces it.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M630809
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