Dorman M115675 Brake Master Cylinder

Reliable Brake Master Cylinder for Mazda RX-7

The Dorman M115675 brake master cylinder is engineered to restore proper brake hydraulics for Mazda RX-7 models. Designed with durable cast iron and equipped with a reservoir and sensor, this master cylinder ensures consistent braking performance.

• Master cylinder bore diameter: 0.875 inches
• Constructed from cast iron for durability
• Includes reservoir for brake fluid
• Equipped with a sensor for brake system monitoring
• Four outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter: 10 mm
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

This Dorman brake master cylinder (part number M115675) is specifically designed for the Mazda RX-7, providing a precise fit and reliable function. The cast iron construction offers strength and resistance to wear, while the 0.875-inch bore diameter supports effective hydraulic pressure. The included reservoir allows for proper brake fluid storage, and the integrated sensor helps maintain system diagnostics. With four outlets and a rearward outlet size of M10 x 1.0, this master cylinder accommodates the brake line connections required for the RX-7’s braking system.

Applications and Problem Resolution

This brake master cylinder is used to replace worn or failing units in Mazda RX-7 vehicles, addressing issues such as:

• Spongy or unresponsive brake pedal feel
• Brake fluid leaks from the master cylinder
• Brake warning light activation due to sensor faults
• Reduced hydraulic pressure affecting braking efficiency
• Contaminated or damaged reservoir components

Installation Notes and Tips

Installation of the Dorman M115675 master cylinder requires careful attention to brake system bleeding procedures to avoid air in the lines. Note that mounting hardware is not included, so existing hardware should be inspected and replaced if necessary. Ensure all connections, including the sensor and outlet threads, are properly secured to maintain system integrity.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for the Mazda RX-7. The part undergoes rigorous quality control to ensure durability and performance. Warranty coverage details can be obtained from the product documentation or Dorman’s official resources.