Turn pedal effort into hydraulic braking pressure with this Jeep XJ master cylinder, the Dorman First Stop Brake Master Cylinder M39981. It is a direct-fit replacement for the 1990-1994 Jeep Cherokee, the 1990-1992 Jeep Comanche and the 1990 Jeep Wagoneer (All engines). It is precision-engineered to match the original master cylinder's design, function and performance on those vehicles, and it is built from new, high-quality materials for a safe, durable replacement.
- Casting-matched housing: the cast-iron cylinder housing matches the casting material of the original part for similar performance.
- EPDM rubber components: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely of new materials for quality and safety.
- Strict specifications: made to meet rigorous SAE International standards.
This Jeep Cherokee master cylinder replacement has a 0.938 in bore and two outlets: a 7/16-24 rearward outlet and a 1/2-20 secondary outlet thread. The reservoir is included. Mounting hardware and a sensor are not included. Country of origin: China.
Signs a master cylinder may need replacing include a brake pedal that feels spongy or slowly sinks, visible brake fluid leaks around the master cylinder, or a fluid level that keeps dropping. Diagnose the cause before replacing, and follow the vehicle service information for installation and brake bleeding.
Interchange: 83-40011 · 100-2667 · M-87011 · 13-2556 · 10-2556 · 130.67011 · 131.67011 · 355-42025
8340011 · 1002667 · M87011 · 132556 · 102556 · 13067011 · 13167011 · 35542025 · 18M532 · M900739 · 12324 · 5252622 · 5252623 · MC128339 · M2556 · NM2556 · MC39981 · F128339
This part cross-references / interchanges with the following part numbers:
18M532, 83-40011, M900739, 100-2667, M-87011, 12324, 13-2556, 10-2556, 130.67011, 131.67011, 5252622, 5252623, MC128339, 355-42025, M2556, NM2556, MC39981, F128339
