Dorman - First Stop Brake Master Cylinder P/N:M630759
Turn every press of the brake pedal into hydraulic pressure at the wheels with the Dorman First Stop Brake Master Cylinder M49212. It is a direct-fit replacement for 11 listed classic applications, including the 1964-1966 Pontiac GTO, 1964-1966 Oldsmobile Cutlass, 1965-1966 Buick Skylark and 1964 Oldsmobile Jetstar 88.
Dorman precision-engineers this master cylinder so its design, function and performance match the original unit. It is made from new, high-quality materials and is intended to provide a safe, durable replacement. If a worn or leaking master cylinder is behind a soft pedal on your vehicle, this unit replaces it.
Specifications: 1 in. bore diameter · one outlet · 7/16-24 rearward outlet size · reservoir included · mounting hardware not included · sensor not included. Country of origin: Taiwan.
A master cylinder may need replacing if you notice a soft or sinking brake pedal, a brake fluid level that keeps dropping, or fluid seeping around the cylinder. Diagnose the brake system first, because other components can cause similar symptoms.
Fitment (engine: All; quantity 1 per vehicle):
Interchange: 83-36010 · 83-50010 · 100-2219 · M-82010 · 13-49212 · 10-49212 · 130.62010 · 355-52003
8336010 · 8350010 · 1002219 · M82010 · 1349212 · 1049212 · 13062010 · 35552003 · M900070 · 11263 · MC511170 · 5464725 · 5465180 · 5465244 · MC36133 · F49212 · MC49212
This part cross-references / interchanges with the following part numbers:
Does the Dorman M49212 come with a reservoir?
Yes. The reservoir is included with this master cylinder. Mounting hardware and a sensor are not included.
What are the bore and outlet specifications?
The M49212 has a 1 in. bore diameter and one outlet, with a 7/16-24 rearward outlet size.
What is the master cylinder made of?
The housing is cast iron. All rubber components are made of a high-quality EPDM compound for resistance to glycol-based brake fluid.
Which vehicles does it fit?
It fits 11 listed applications, including the 1964-1966 Pontiac GTO, 1964-1966 Oldsmobile Cutlass, 1965-1966 Buick Skylark and 1964 Oldsmobile Jetstar 88. See the Buyer's Guide tab for the full list.
What are signs my master cylinder may need replacing?
Watch for a soft or sinking pedal, a dropping brake fluid level, or fluid seeping around the cylinder. Diagnose the brake system first, because other components can cause similar symptoms.
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.