Dorman M39518 Brake Master Cylinder

Reliable Brake Master Cylinder for Toyota Pickup

The Dorman M39518 brake master cylinder is engineered to restore proper brake hydraulics for Toyota Pickup models. Designed with durable cast iron and equipped with a reservoir and sensor, this master cylinder ensures consistent braking performance and safety.

• Master cylinder bore diameter: 0.938 inches for precise hydraulic pressure
• Constructed from cast iron for strength and durability
• Includes reservoir for brake fluid storage
• Equipped with a sensor to monitor brake system status
• Two outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter of 10 mm
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M39518 brake master cylinder is specifically designed for Toyota Pickup vehicles, providing a direct replacement for the original part. Its 0.938-inch bore diameter allows for accurate hydraulic pressure control, essential for effective braking. The cast iron construction offers long-lasting durability under demanding conditions. This master cylinder comes with an integrated reservoir to hold brake fluid and a sensor to provide feedback on brake system performance. Featuring two outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, it supports proper brake line connections. Note that mounting hardware is not included, so existing hardware should be reused or sourced separately.

Common Applications and Problem Resolution

• Restores brake pressure in Toyota Pickup brake systems
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses spongy or unresponsive brake pedal issues
• Fixes brake warning light activation related to sensor faults
• Improves overall brake system reliability and safety

Installation Notes and Tips

Installation of the Dorman M39518 brake master cylinder requires careful attention to brake line connections and proper bleeding of the brake system to remove air. Since mounting hardware is not included, verify the condition of existing bolts and fittings before installation. Ensure the sensor connector is properly attached to maintain brake system monitoring. Follow vehicle-specific service manual instructions for torque specifications and brake fluid type.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron material and integrated sensor contribute to reliable performance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their replacement parts. Consult product packaging or Dorman’s official resources for exact warranty terms.