Dorman - First Stop Brake Master Cylinder P/N:M630623
Turn pedal force into hydraulic braking pressure with the Dorman First Stop Brake Master Cylinder M630063. It is a direct-fit replacement Ford Expedition master cylinder for 2002-2006 models, and it also fits the 2002-2006 Lincoln Navigator and the 2003-2004 Lincoln Aviator, all engines. Dorman designed it to match the original master cylinder's design, function and performance on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.
Specifications: The bore diameter is 1.125 in. There are three outlets, with outlet threads of M12 x 1.0 and M14 x 1.5. The reservoir and sensor are included. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.
A soft or sinking brake pedal, fluid leaking at the cylinder or a dropping reservoir level are signs a master cylinder may need replacing. Other brake components can cause the same symptoms, so diagnose the cause before replacing. Follow the vehicle service procedure for bench bleeding and system bleeding.
Interchange: 100-2534 · 13-3030 · 10-3030 · 130.65080 · 355-54196 · BRMC-2
1002534 · 133030 · 103030 · 13065080 · 35554196 · BRMC2 · 13856 · MC511400 · 2L1Z2140BA · 2L1Z2140BB · 2L1Z2140DA · 4L1Z2140BA · M4040 · NM4040 · MC390763 · F141630 · MC141630
This part cross-references / interchanges with the following part numbers:
Is this the right master cylinder for a 2002 Ford Expedition?
Yes. It is listed as a direct-fit replacement for the 2002-2006 Ford Expedition with all engines. Check the Buyer's Guide tab to confirm your vehicle.
Does it also fit Lincoln models?
Yes. It is listed for the 2002-2006 Lincoln Navigator and the 2003-2004 Lincoln Aviator, all engines.
What comes in the box?
The master cylinder, with the reservoir and sensor included. Mounting hardware is not included, so consult the service information for the correct fasteners and whether they may be reused.
What are the key specifications?
It has an aluminum housing, a 1.125-inch bore and three outlets with M12 x 1.0 and M14 x 1.5 threads. Its rubber parts use an EPDM compound that resists glycol-based brake fluid.
What are signs a master cylinder may need replacing?
A soft or sinking pedal, fluid leaking at the cylinder or a dropping reservoir level. Other brake components can cause similar symptoms, so diagnose the cause first.
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.