Dorman - First Stop Brake Master Cylinder P/N:M630510
Turn pedal effort into hydraulic pressure for your brakes with the Dorman First Stop Brake Master Cylinder M630320. It fits many vehicles, among them the 2000-2005 Chevrolet Impala, 2003-2005 Chevrolet Monte Carlo and 2003-2005 Buick Century with all engines, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list. This new unit is designed to match the design, function and performance of the original master cylinder.
Specifications: 1 in bore diameter, four outlets and an M10 x 1.0 secondary outlet thread. The reservoir and a sensor are included. Mounting hardware is not included. Country of origin: China.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, fluid leaking around the master cylinder, or a lit brake warning light. If a failed master cylinder is the cause, this unit replaces it. Diagnose the brake system first, and bleed it according to the vehicle service procedure after installation.
Interchange: 174-1000 · 174-784 · 100-3024 · M-82112 · 13-2960 · 10-2960 · 130.62112 · 131.62112 · 355-47084
1741000 · 174784 · 1003024 · M82112 · 132960 · 102960 · 13062112 · 13162112 · 35547084 · 18M980 · M901137 · 13552 · MC500190 · MC512670 · 18040251 · 18047667 · 18060781 · 19209247 · M3090 · NM3090 · MC390645 · F131053 · F139956 · MC131053 · MC139956
This part cross-references / interchanges with the following part numbers:
Is this the right Impala master cylinder for a 2000-2005 Chevrolet Impala?
Yes. It is listed as a direct-fit replacement for the 2000-2005 Chevrolet Impala with all engines, one per vehicle. Check the Buyer's Guide tab for other applications.
Does it also fit the 2003-2005 Chevrolet Monte Carlo and 2003-2005 Buick Century?
Yes. It is listed for the 2003-2005 Chevrolet Monte Carlo and the 2003-2005 Buick Century with all engines. See the Buyer's Guide tab for the full fitment chart.
What comes in the box?
You get the master cylinder, with the reservoir and a sensor included. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners and whether the originals may be reused.
What are the key specifications?
It has an aluminum housing, a 1 in bore diameter, four outlets and an M10 x 1.0 secondary outlet thread. Its rubber components use an EPDM compound that resists glycol-based brake fluid.
Does the brake system need bleeding after installation?
Yes. Air must be removed from the hydraulic system after a master cylinder is replaced. Follow the vehicle service procedure for the correct bleeding steps.
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.