Lining up a Dorman master cylinder bleeder kit for a brake repair? The Dorman - First Stop Brake Master Cylinder M39746 turns pedal effort into the hydraulic pressure that applies the brakes. It is a direct-fit replacement for the 1986-1991 Mazda RX-7; see the Buyer's Guide tab for engine details.
This Dorman brake master cylinder is engineered to replicate the design, function and performance of the original unit on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, brake fluid seeping around the cylinder, or a fluid level that keeps dropping. Diagnose the brake system first; if the master cylinder is the cause, M39746 replaces it. Follow the vehicle service information for the correct installation and bleeding procedure.
Interchange: 783-14105 · 83-14105 · 100-1380 · M-53105 · 072-8430 · 13-2215 · 11-2215 · 130.45105 · 355-80007
78314105 · 8314105 · 1001380 · M53105 · 0728430 · 132215 · 112215 · 13045105 · 35580007 · 18M414 · M900621 · 12381 · MC115674 · M52215 · NM52215 · FB0243400B · FB0243400C · FB0243400D · MC391446 · F115674
This part cross-references / interchanges with the following part numbers:
What vehicles does the Dorman master cylinder M39746 fit?
It is listed for the 1986-1991 Mazda RX-7. Check the Buyer's Guide tab for the engine details that apply to your car.
What does a brake master cylinder do?
It converts force from the brake pedal into hydraulic pressure. That pressure sends brake fluid through the lines to apply the brakes.
What are signs a master cylinder may need replacing?
Common signs include a soft or sinking pedal, fluid seeping around the cylinder, or a steadily dropping fluid level. Diagnose the system first, because other brake parts can cause similar symptoms.
What are the rubber components made of?
All rubber components use a high-quality EPDM compound designed to resist glycol-based brake fluid.
What standards is this master cylinder built to?
It is made to meet rigorous SAE International standards. Its housing is constructed to match the casting material of the original part.
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.
