Dorman - First Stop Brake Master Cylinder P/N:M390368

Turn brake-pedal effort into the hydraulic pressure that operates your brakes with the Dorman - First Stop Brake Master Cylinder (MPN M390368). It installs as a direct-fit replacement for the 1996-2000 Toyota 4Runner (all engines), and is precision-engineered to match the design, function, and performance of the original unit.

The master cylinder converts pedal force into hydraulic pressure and routes it through its two outlets to the brake circuits. Signs the original may need replacing include a sinking or spongy pedal or brake-fluid seepage — diagnose the cause before replacing.

• Aluminum housing: the cylinder housing is built to match the casting material of the original part for similar performance.
• Fluid-resistant 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.
• Built to spec: made to meet rigorous SAE International standards.

Specs: 1 in bore diameter and two outlets, with M10 x 1.0 rearward/secondary outlet threads and a 1 mm primary outlet thread pitch. Includes the reservoir and sensor; mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.

Interchange: 18M797 · 83-22728 · 8322728 · M901030 · 100-1658 · 1001658 · M-56728 · M56728 · 072-9148 · 0729148 · 13215 · 13-2831 · 132831 · 11-2831 · 112831 · 130.44728 · 13044728 · MC500100 · 355-76131 · 35576131 · M55090 · NM55090 · MC390368 · 472013D350 · F131915 · MC131915. Manufacturer part number M390368.