Convert brake-pedal force into the hydraulic pressure that feeds both brake circuits with the Dorman - First Stop Brake Master Cylinder M630918. It's precision-built to match the design, function, and performance of the factory master cylinder, dropping in as a direct-fit replacement for the listed BMW applications — including the 2013 BMW 125I, 2014-2016 BMW 328I, 2016-2018 BMW 330I, 2018-2019 BMW 440I, and 2019 BMW 750I. See the Buyer's Guide tab for the full list of 55 applications.
- Cast-iron housing: constructed to match the casting material of the original part for similar performance.
- EPDM rubber components: made from a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: built entirely from new materials, not remanufactured.
- Made to SAE International standards with a 1 in bore, two outlets, and an M12x1.0 secondary outlet thread.
This is a single reservoir-type master cylinder; the reservoir, sensor, and mounting hardware are not included, so transfer or replace those items as directed by the service procedure. If a failed master cylinder is the cause of a sinking pedal or a loss of hydraulic pressure, this replaces it — diagnose the cause before replacing. Country of origin: Taiwan.
Interchange: 100-4093 · 1004093 · 34336851095 · 11-4694 · 114694 · 130.34122 · MC391505 · MC146080 · Manufacturer part number M630918
This part cross-references / interchanges with the following part numbers:
100-4093, 34336851095, 11-4694, 130.34122, MC391505, MC146080
