Dorman M390034 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder for Mazda Miata

The Dorman M390034 brake master cylinder is designed specifically for Mazda Miata models, providing reliable brake hydraulics performance. This master cylinder features an aluminum construction and includes a reservoir and sensor to ensure proper brake system function.

• Compatible with Mazda Miata vehicles
• Master cylinder bore diameter: 0.875 inches
• Constructed from durable aluminum material
• Includes reservoir and sensor for integrated brake system monitoring
• Three outlet ports with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter of 10 mm
• Mounting hardware not included

Detailed Product Description

The Dorman M390034 brake master cylinder is engineered to meet the hydraulic braking needs of Mazda Miata vehicles. Its aluminum body offers corrosion resistance and strength, ensuring long-term durability under demanding conditions. The 0.875-inch bore diameter is designed to provide consistent hydraulic pressure for effective braking response. This master cylinder comes with an integrated reservoir to hold brake fluid and a sensor to monitor fluid levels or pressure, enhancing safety and maintenance awareness.

Featuring three outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch and a secondary outlet thread diameter of 10 mm, this part supports complex brake line configurations typical in Mazda Miata brake systems. Note that mounting hardware is not included, so ensure you have the necessary components for installation.

Common Applications and Issues Addressed

• Restores proper brake fluid pressure in Mazda Miata brake systems
• Replaces worn or leaking master cylinders causing brake pedal sponginess
• Solves brake fluid reservoir leaks or sensor malfunctions
• Addresses inconsistent braking performance due to master cylinder wear
• Supports brake system upgrades requiring precise hydraulic control

Installation Notes and Tips

• Verify compatibility with your specific Mazda Miata model year before installation
• Bleed the brake system thoroughly after installation to remove air pockets
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Check all outlet connections for proper thread engagement and sealing
• Ensure the sensor is correctly connected to the vehicle’s monitoring system

Quality Assurance and Warranty

Dorman manufactures the M390034 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system operation. While specific warranty details should be confirmed at the point of purchase, Dorman typically offers limited warranties covering defects in materials and workmanship.