Dorman - First Stop Brake Master Cylinder P/N:M630794
Dorman M39971 brake master cylinder for the 1996-1997 Acura RL and other vehicles turns pedal force into hydraulic pressure for the brakes. Its housing is aluminum.
A soft or sinking brake pedal, a brake warning light or fluid around the cylinder can mean this master cylinder is worn, though a leaking brake line or a worn caliper can be behind the same signs, so find the cause before you replace anything.
This brake master cylinder fits the 1996-1997 Acura RL, the 1996 Acura TL and the 1991-1995 Acura Legend. The Legend takes one, and so do the other two.
Fit and size
Build and materials
One master cylinder with its reservoir and sensor. Mounting hardware is not included, so plan on new hardware rather than reusing the old.
Interchange: 783-08021 · 83-08021 · 100-1322 · M-54021 · 072-8878 · 13-2572 · 11-2572 · 130.40021 · 131.40021 · 355-58006
18M522 · M900729 · M901267 · 12481 · 13633 · MC250300 · 46100SP0A53 · 46100SP0A54 · M55012 · NM55012 · MC390355 · MC39971 · F128292 · MC128292
Is this a brake master cylinder for the 1996 Acura TL?
Does this Dorman master cylinder come with the reservoir and sensor?
Yes. This master cylinder includes the reservoir and the sensor. Mounting hardware is not included.
What are the bore size and outlet threads on this Dorman brake master cylinder?
Dorman M39971 has a 1 in bore and two outlets. The rear outlet is M12 x 1.0 and the secondary outlet thread is M10 x 1.0.
What are the rubber parts in this master cylinder made of?
All rubber components are made of EPDM compound, which resists glycol-based brake fluid. The housing is aluminum.
Does Dorman M39971 meet any standards?
Yes. Dorman M39971 is made to meet rigorous SAE International standards, and it is built entirely of new materials.
This part cross-references / interchanges with the following part numbers:
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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.