Dorman - First Stop Brake Master Cylinder P/N:M73333
Convert brake-pedal force into the hydraulic pressure that operates the brakes with the Dorman - First Stop Brake Master Cylinder M630889. It installs as a direct-fit replacement for the 2012-2015 Kia Optima [All], precision-built to match the design, function, and performance of the original master cylinder for these applications.
This unit has a 0.9375-inch bore and two outlets, with an M12 x 1.0 rearward and secondary outlet thread and a 1 mm primary outlet thread pitch. It comes with a single reservoir and a fluid-level sensor included. Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether they may be reused. A sinking or spongy pedal or a loss of hydraulic pressure can be a sign the master cylinder may need replacing — if a failed master cylinder is the cause, this unit replaces it. Country of origin: Taiwan.
Interchange: 100-4092 · 1004092 · 13-4692 · 134692 · 130.50061 · 355-21059 · 35521059 · 585102T280 · NM55679
Manufacturer part number M630889.
This part cross-references / interchanges with the following part numbers:
What vehicle does this master cylinder fit?
It is a direct-fit replacement for the 2012-2015 Kia Optima [All]. Check the Buyer's Guide tab to confirm fitment for your exact vehicle.
Does it include a reservoir and a fluid-level sensor?
Yes. This unit comes with a single reservoir and a fluid-level sensor included.
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 specifications?
It has a 0.9375-inch bore and two outlets, with M12 x 1.0 rearward and secondary outlet threads and a 1 mm primary outlet thread pitch.
What is it made of?
The cylinder housing is cast iron, constructed to match the casting material of the original part, and the rubber components use a high-quality EPDM compound resistant to glycol-based brake fluid.
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.