Dorman - First Stop Brake Master Cylinder P/N:M630939

Turn pedal effort into the hydraulic pressure your brakes rely on with the Dorman First Stop Brake Master Cylinder M630939, a direct-fit 2016-2019 Kia Optima master cylinder that also fits the 2015-2019 Hyundai Sonata, all engines. Each vehicle uses one. Dorman designed this unit to mirror the design, function and performance of the original master cylinder, and built it from new, high-quality materials.

• Precise replacement: the cast iron cylinder housing is built to match the casting material of the original part for similar performance.
• Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
• 100% new: made entirely of new materials.
• Strict specifications: made to meet rigorous SAE International standards.

The master cylinder converts brake pedal force into hydraulic pressure and sends it through its two outlets to the brake circuits. This unit has a 0.875-inch bore, and its rearward and secondary outlets are threaded M12 x 1.0, with a 1 mm primary outlet thread pitch. A single reservoir and a sensor are included. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners and whether the originals may be reused. Country of origin: China.

Interchange: 130.51072 · 355-03066
13051072 · 35503066 · 58510C1200 · NM55638 · MC391490