MPA Electrical NM52221 Brake Master Cylinder

Brake Master Cylinder for Mazda B-Series

Restore hydraulic brake performance with this new MPA Electrical brake master cylinder, part number NM52221. It is a standard replacement unit built with a cast iron body, a 0.875-inch bore, and an included reservoir and cap for service-ready installation.

Compatible with 1986-1993 Mazda B-Series trucks with front disc brakes, including Mazda B2000, Mazda B2200, and Mazda B2600 applications. The NM52221 is engineered to match OE specifications using MPA Electrical’s sample-based testing process for consistent brake pedal response.

Key Features

• Brand: MPA Electrical
• Part number: NM52221
• Standard replacement brake master cylinder
• Cast iron construction
• 0.875-inch master cylinder bore diameter
• Reservoir included
• Master cylinder cap included
• Uses DOT 3 brake fluid
• Two mounting holes with 0.34-inch mounting hole diameter
• New condition

Product Details

The MPA Electrical NM52221 brake master cylinder is built for Mazda B2200, Mazda B2600, and Mazda B2000 trucks equipped with front disc brakes. As a hydraulic brake component, it converts pedal input into brake pressure, helping restore firm, predictable braking response when the original master cylinder is worn or leaking. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

MPA Electrical’s New with front disc brakes product line focuses on direct-fit brake hydraulic replacements for specific vehicle configurations. For this application, NM52221 is matched to the listed Mazda trucks and supports OE-style service replacement needs without adding unrelated components such as a booster, push rod, sensor, or pressure switch.

Common Issues This Part Can Address

• Low or sinking brake pedal
• Brake fluid leakage at the master cylinder
• Uneven or delayed hydraulic brake response
• Internal seal wear causing loss of pressure
• Brake warning symptoms related to master cylinder failure

Installation Notes

Verify vehicle configuration before installation: this part is listed for 1986-1987 Mazda B2000, 1987-1993 Mazda B2200, and 1990-1993 Mazda B2600 with front disc brakes. Bench bleed the master cylinder before connecting brake lines, use clean DOT 3 brake fluid, and inspect the brake system for contamination or leaks before returning the vehicle to service.

Mounting hardware, gasket or seal, push rod, brake booster, sensor, and brake pressure switch are not included. Confirm the mounting hole pattern and brake line connections against the original unit before installation.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary procedures and strict inspection protocols. That process is intended to deliver consistent hydraulic performance out of the box for Mazda B-Series brake service.