Keep hydraulic pressure moving from the pedal to the brakes with this 1980-1982 and 1984-1987 Toyota Corolla master cylinder, the Dorman First Stop Brake Master Cylinder M39423. It is a direct-fit replacement for the 1980-1982 Toyota Corolla and the 1984-1987 Toyota Corolla. Dorman precision-engineers it to replicate the original master cylinder's design, function and performance on those applications, and builds it from new, high-quality materials for a safe, durable replacement.
- Precise replacement: The cast iron cylinder housing matches the casting material of the original part for similar performance.
- Durable design: 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.
When you press the pedal, the master cylinder turns that force into hydraulic pressure and pushes brake fluid out to the brake lines. Signs this brake master cylinder may need replacing include a soft or sinking pedal, fluid leaking at the cylinder or reservoir, or a fluid level that keeps dropping. If a failed master cylinder is the cause, M39423 replaces it. Diagnose the brake system first.
Specifications: 0.813 in bore diameter; 2 outlets; secondary outlet thread M10 x 1.0; primary outlet thread pitch 1 mm; rearward outlet size M10 x 1.0. The reservoir is included. No sensor or mounting hardware is included, so consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.
See the Buyer's Guide tab for full fitment details.
