Turn pedal effort into hydraulic pressure for the brakes with the Dorman First Stop Brake Master Cylinder M630778. This new unit is a direct-fit replacement for the 2005-2007 Cadillac CTS, 2005-2009 Cadillac SRX and 2005-2008 Cadillac STS (engine: All). It is precision-engineered to mirror the design, function and performance of the original master cylinder on those vehicles.
- Precise replacement: the aluminum cylinder housing is made to match the material of the original part and is designed for similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely from new, high-quality materials for a safe, durable replacement.
- Strict specifications: made to meet rigorous SAE International standards.
Specifications: 1 in bore diameter, two outlets, a 1/2-20 rearward outlet size and a 1/2-20 secondary outlet thread. The 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. Each listed application uses one. Country of origin: China.
Signs a master cylinder may need replacing: a soft or slowly sinking brake pedal, brake fluid leaking at the master cylinder or reservoir, or a lit brake warning light. Other parts of the brake system can cause these same symptoms, so diagnose the cause before replacing the master cylinder.
Interchange: 100-2350 · 13-3161 · 10-3161 · 130.62138 · 355-46016
1002350 · 133161 · 103161 · 13062138 · 35546016 · 10367561 · M4081 · MC390908 · F142637 · MC142637
This part cross-references / interchanges with the following part numbers:
100-2350, 13-3161, 10-3161, 130.62138, 355-46016, 10367561, M4081, MC390908, F142637, MC142637
