Dorman - First Stop Brake Master Cylinder P/N:M39366

Restore firm, responsive brake-pedal feel with the Dorman - First Stop Brake Master Cylinder (M39366). The master cylinder converts the force you apply at the brake pedal into the hydraulic pressure that operates the vehicle's brakes. It is precision-engineered to match the design, function, and performance of the original master cylinder on the listed applications, dropping in as a direct-fit replacement for the 1978-1983 Jeep CJ5 (All), 1978-1986 Jeep CJ7 (All), and 1981-1985 Jeep Scrambler (All).

• Cast-iron housing: constructed to match the casting material of the original part for similar performance.
• Durable EPDM seals: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
• 100% new: made entirely of new materials, not remanufactured, and built to meet rigorous SAE International standards.
• Specs: 1 in bore, two outlets, and a 1/2-20 rearward outlet size; reservoir included. Mounting hardware and sensor are not included.

Signs the master cylinder may need replacing include a brake pedal that slowly sinks to the floor under steady pressure or a spongy, low pedal. If a failed master cylinder is the cause, this unit replaces it. Country of origin: China.

Interchange: 18M194 · 83-40007 · 8340007 · M900393 · M900394 · 100-2660 · 1002660 · M-87007 · M87007 · 11776 · 13-1776 · 131776 · 10-1776 · 101776 · 130.67007 · 130.67015 · 131.67007 · 131.67015 · 5358746 · 5359745 · 8133921 · 8983500995 · MC250820 · 355-42024 · 35542024 · 355-42028 · 35542028 · 105872 · M1776 · NM1776 · MC39365 · MC39366 · F105872 · MC105872. Manufacturer part number M39366.