Dorman M390334 Brake Master Cylinder

Reliable Brake Master Cylinder for Mazda MPV

The Dorman M390334 brake master cylinder is engineered to restore proper brake hydraulics for your Mazda MPV. Designed with durable cast iron and equipped with a reservoir and sensor, this master cylinder ensures consistent braking performance.

• Master cylinder bore diameter: 0.938 inches
• Constructed from cast iron for durability
• Includes reservoir for brake fluid
• Equipped with sensor for monitoring
• Two outlets with rearward outlet size M18 x 1.0
• Secondary outlet thread diameter: 10 mm with 1.0 thread pitch
• Package contains master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M390334 brake master cylinder is specifically designed for the Mazda MPV, providing a precise fit and reliable function. Its 0.938-inch bore diameter allows for optimal hydraulic pressure transfer, while the cast iron construction offers strength and resistance to wear. The included reservoir simplifies installation and maintenance by housing brake fluid securely. Additionally, the integrated sensor supports vehicle brake system monitoring, enhancing safety. The master cylinder features two outlets, including a rearward outlet sized M18 x 1.0, and a secondary outlet with a 10 mm thread diameter and 1.0 thread pitch, ensuring compatibility with the vehicle's brake lines.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or damaged master cylinder
• Eliminates brake fluid leaks from the master cylinder reservoir
• Resolves brake pedal sinking or sponginess issues
• Replaces faulty brake fluid sensor for accurate system monitoring
• Addresses uneven braking caused by hydraulic failures

Installation Notes and Tips

• Ensure brake system is properly bled after installation to remove air
• Mounting hardware is not included; retain original hardware or purchase separately
• Verify sensor connection compatibility with Mazda MPV brake system
• Inspect brake lines for wear or damage during installation
• Follow vehicle manufacturer torque specifications for outlet fittings

Quality Assurance and Warranty

Dorman manufactures the M390334 brake master cylinder to meet or exceed OEM standards for fit and function on the Mazda MPV. The cast iron material and integrated sensor contribute to long-term reliability. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or supplier for exact warranty terms.