Dorman M39489 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder for Mazda RX-7

The Dorman M39489 brake master cylinder is designed specifically for Mazda RX-7 models, providing reliable brake hydraulics performance. This cast iron master cylinder includes a reservoir and sensor, ensuring compatibility and functionality for your vehicle's braking system.

• Master cylinder bore diameter: 0.813 inches
• Constructed from durable cast iron material
• Includes reservoir for brake fluid
• Equipped with a sensor for system monitoring
• Two outlet ports with rearward outlet size M10 x 1.0 thread pitch
• Secondary outlet thread diameter: 10 mm
• Package contains the master cylinder only; mounting hardware not included

Detailed Product Description

The Dorman M39489 brake master cylinder is engineered to meet the specifications required for Mazda RX-7 brake hydraulics. Its 0.813-inch bore diameter ensures proper hydraulic pressure for effective braking. Made from cast iron, this master cylinder offers strength and durability under demanding conditions. The included reservoir allows for proper brake fluid storage and circulation, while the integrated sensor supports brake system diagnostics and safety features. Featuring two outlets with a rearward outlet size of M10 x 1.0 and a secondary outlet thread diameter of 10 mm, this part is designed to fit precisely and function reliably within the RX-7's brake system.

Common Applications and Issues Addressed

• Restores proper brake fluid pressure and pedal feel
• Replaces leaking or damaged master cylinders
• Resolves brake warning light issues related to sensor failure
• Addresses brake fluid reservoir leaks or cracks
• Improves overall brake system responsiveness and safety

Installation Notes and Tips

Installation of the Dorman M39489 brake 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 the sensor connector is properly attached to maintain brake system monitoring functions. Compatibility is specific to Mazda RX-7 models; verify fitment before installation.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and integrated sensor contribute to long-term reliability. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics components. Consult product documentation or the manufacturer for exact warranty terms.