Dorman M630246 Brake Master Cylinder

Reliable Brake Master Cylinder for Mazda Miata

The Dorman M630246 brake master cylinder is engineered to restore proper brake hydraulics in your Mazda Miata. Designed with precision, this master cylinder includes a reservoir and sensor to ensure consistent brake performance.

• Master cylinder bore diameter: 0.938 inches for accurate hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for fluid storage and sensor for monitoring brake system status
• Features three outlets with a secondary outlet thread diameter of 10 mm and rearward outlet size M10 x 1.0
• Thread pitch of 1.0 ensures secure fitting in brake hydraulic systems

Product Details and Specifications

This Dorman brake master cylinder (part number M630246) is specifically designed for the Mazda Miata, providing a direct replacement for the original component. The aluminum construction offers a balance of strength and lightweight durability, while the included reservoir simplifies brake fluid management. The integrated sensor helps maintain system integrity by providing real-time feedback on brake fluid levels or pressure. With three outlets, including a secondary outlet with a 10 mm thread diameter and a rearward outlet sized M10 x 1.0, this master cylinder supports complex brake hydraulic configurations found in the Miata.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or damaged master cylinder
• Replaces leaking or cracked brake fluid reservoir
• Resolves brake pedal sponginess caused by internal cylinder wear
• Addresses sensor faults related to brake fluid monitoring
• Fixes issues with brake fluid distribution in multi-outlet hydraulic systems

Installation Notes and Tips

Installation of the Dorman M630246 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic function. Verify thread pitch and outlet sizes match your vehicle’s brake lines before installation. Since mounting hardware is not included, retain original fasteners or source compatible hardware. Consult the Mazda Miata service manual for torque specifications and sensor wiring procedures.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit and function. The aluminum material provides corrosion resistance for extended service life. This part includes a sensor to maintain system diagnostics. Warranty details should be confirmed with the distributor or manufacturer to ensure coverage.