Dorman - First Stop Brake Master Cylinder P/N:M39590

Rebuild pedal pressure right at its source with the Dorman - First Stop Brake Master Cylinder M39590. The master cylinder converts the force you apply at the brake pedal into the hydraulic pressure that pushes fluid through the lines to the brakes, so a worn or leaking unit can cause a fading or sinking brake pedal. It installs as a direct-fit replacement for the listed applications: the 1983-1987 Mitsubishi Montero, 1987 Dodge Raider, 1987-1988 Dodge Ram 50, and 1987-1988 Mitsubishi Mighty Max.

• Hydraulic heart of the brake system: converts brake-pedal force into the hydraulic pressure that operates the brakes.
• Signs this part may need replacing: a brake pedal that slowly sinks toward the floor, a soft or spongy pedal, or unexplained brake-fluid loss — if a failed master cylinder is the cause, this replaces it.
• Install-ready service part: bench-bleed the new master cylinder before mounting it, then bleed the brake system following the vehicle service procedure.

Diagnose the cause of a low or spongy pedal before replacing, since these symptoms can also come from other brake components. Manufacturer part number M39590.