Dorman M630221 Brake Master Cylinder

Reliable Brake Master Cylinder for Mazda Protege

The Dorman M630221 brake master cylinder is engineered to restore proper brake hydraulics for Mazda Protege models. Designed with precision, this aluminum 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
• Includes reservoir for fluid storage
• Equipped with sensor for brake system monitoring
• Four outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter of 10 mm
• Package contains master cylinder only; mounting hardware not included

Product Details and Specifications

This Dorman brake master cylinder (part number M630221) is specifically designed for Mazda Protege vehicles, ensuring compatibility and reliable fitment. The aluminum construction offers corrosion resistance and strength, while the 0.938-inch bore diameter provides precise hydraulic pressure control. The included reservoir allows for proper brake fluid containment, and the integrated sensor supports brake system diagnostics. Featuring four outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, this master cylinder supports efficient brake fluid distribution. Note that mounting hardware is not included with this part.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or damaged master cylinder
• Eliminates brake fluid leaks from a faulty reservoir or seals
• Resolves brake warning light issues related to sensor failure
• Improves brake pedal feel and responsiveness
• Addresses uneven brake fluid distribution in Mazda Protege brake systems

Installation Notes and Tips

When installing the Dorman M630221 brake master cylinder on a Mazda Protege, ensure the brake fluid reservoir is properly filled and free of contaminants. Bleed the brake system thoroughly to remove air pockets and verify sensor connections for accurate brake system monitoring. Since mounting hardware is not included, retain or source compatible hardware for secure installation. Follow vehicle-specific service manual instructions for torque specifications and safety precautions.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum material provides durability and corrosion resistance for long service life. This part includes a sensor to maintain brake system integrity. Warranty coverage details should be confirmed with the distributor or manufacturer, as it may vary by region.