MPA Electrical NM1732 Brake Master Cylinder

Brake Master Cylinder for Front Disc Brake Applications

The MPA Electrical NM1732 brake master cylinder is a standard replacement unit for select Chevrolet, GMC, and Cadillac vehicles with front disc brakes. Built with a cast iron body, integral reservoir, and a 1.125-inch bore, it is engineered to restore consistent hydraulic brake performance in classic truck and passenger car applications.

MPA Electrical’s New with front disc brakes product line focuses on direct-fit brake hydraulic replacements for vehicles that require the correct bore size, mounting pattern, and fluid compatibility. The NM1732 is supplied as a new master cylinder with a reservoir and cap, using DOT 3 brake fluid specifications.

Key Features

• Standard replacement brake master cylinder for front disc brake setups
• Cast iron master cylinder construction
• 1.125-inch bore diameter for hydraulic brake operation
• Integral reservoir design with reservoir included
• Master cylinder cap included
• Two mounting holes with 0.425-inch mounting hole diameter
• DOT 3 brake fluid specification
• New condition, built to OE specifications using tested manufacturing processes

Detailed Description

The MPA Electrical NM1732 brake master cylinder is designed for vehicles that use front disc brakes and require a direct hydraulic replacement. It is a cast iron, integral-reservoir master cylinder with a 1.125-inch bore, making it a practical choice for restoring brake pedal response and fluid pressure in older GM applications. This part number, NM1732, is listed for 1970 Chevrolet Monte Carlo, 1976-1980 Chevrolet C10 Suburban, C20, C20 Suburban, G30, K10 Suburban, K20, K20 Suburban, and P20, plus 1977 Chevrolet K30, 1976-1978 Cadillac Eldorado, Commercial Chassis, DeVille, and Fleetwood, and 1976-1978 GMC G35 and 1979-1980 GMC C1500 Suburban, C2500, C2500 Suburban, G3500, K1500 Suburban, K2500, K2500 Suburban, and P2500. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Low or inconsistent brake pedal pressure
• Internal master cylinder wear affecting hydraulic performance
• Brake fluid leakage at the master cylinder body
• Brake response issues on front disc brake systems
• Replacement needs for aging OE hydraulic components

Installation Notes and Tips

Verify bore size, mounting hole spacing, and brake system configuration before installation. This master cylinder does not include mounting hardware, a brake booster, push rod, gasket or seal, or brake pressure switch. Use DOT 3 brake fluid and bench bleed the unit before connecting brake lines to help reduce trapped air in the hydraulic system. Confirm the vehicle application against the listed fitment for Chevrolet, GMC, and Cadillac models before final assembly.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary processes and strict protocols. The goal is consistent hydraulic performance out of the box for the listed Chevrolet Monte Carlo, Chevrolet C10/C20/K-series and GMC C/K-series applications, as well as the Cadillac Eldorado, Commercial Chassis, DeVille, and Fleetwood fitments.