Turn pedal effort into hydraulic braking pressure with the Dorman First Stop Brake Master Cylinder M630889, a new 2012-2015 Kia Optima master cylinder that serves as a direct-fit replacement for all engines in that application. Dorman engineers it to match the original master cylinder's design, function and performance on the listed applications. It is made from new, high-quality materials as a durable replacement.
- Precise replacement: The cast iron cylinder housing is constructed to match the original part's casting material and is intended to deliver similar performance.
- Durable design: Every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: Built entirely from new materials.
- Strict specifications: Produced to meet the rigorous standards of SAE International.
Specifications: 0.9375-inch bore diameter, two outlets, M12 x 1.0 secondary outlet thread, 1 mm primary outlet thread pitch, M12 x 1.0 rearward outlet size, and a single reservoir. The reservoir and sensor are included, but mounting hardware is not. Country of origin: Taiwan.
Signs that a master cylinder may need replacing include a soft or sinking brake pedal, brake fluid leaking at the cylinder, and an illuminated brake warning light. Other parts of the brake system can cause these symptoms, so diagnose the cause before you replace the master cylinder. Consult the vehicle service information for the correct fasteners and bleeding procedure.
Interchange: 100-4092 · 13-4692 · 130.50061 · 355-21059
1004092 · 134692 · 13050061 · 35521059 · 585102T280 · NM55679
This part cross-references / interchanges with the following part numbers:
100-4092, 13-4692, 130.50061, 355-21059, 585102T280, NM55679
