MPA Electrical NM1745 Brake Master Cylinder

Brake Master Cylinder for Front Disc Brake Applications

The MPA Electrical NM1745 brake master cylinder is a standard replacement unit for select GM and Cadillac applications with front disc brakes. It is built with a cast iron body, integral reservoir, and a 1.125-inch bore to restore hydraulic brake pressure and pedal response.

Compatible with 1977-1979 Buick LeSabre, 1977-1979 Cadillac Fleetwood, 1977-1979 Cadillac Seville, 1977-1978 Buick Riviera, and 1979-1980 Pontiac Firebird with front disc brakes. The NM1745 is a direct-fit brake hydraulic component for vehicles that require a conventional DOT 3 master cylinder setup.

Key Features

• Brand: MPA Electrical
• Part number: NM1745
• Brake master cylinder for front disc brake vehicles
• Cast iron master cylinder construction
• Integral reservoir design with reservoir included
• 1.125-inch bore diameter
• Master cylinder cap included
• Standard replacement grade
• Uses DOT 3 brake fluid

Product Details

MPA Electrical’s New with front disc brakes line focuses on replacement brake hydraulics for vehicles that need the correct OE-style configuration. This NM1745 master cylinder is tested against OE specifications using controlled validation processes and sample-based reference data to help ensure consistent hydraulic performance after installation. It is intended for applications that require a two-mount-hole master cylinder with an integral reservoir and no brake booster, push rod, sensor, or pressure switch included.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Low or inconsistent brake pedal feel
• Internal master cylinder leakage
• Brake fluid bypass causing reduced hydraulic pressure
• Delayed brake response in front disc brake systems
• Wear-related loss of braking performance

Installation Notes and Tips

• Verify vehicle brake configuration before ordering; this unit is listed for front disc brake applications only.
• Inspect the brake booster, lines, and fittings before installation.
• Bench bleed the master cylinder before connecting brake lines.
• Use fresh DOT 3 brake fluid and bleed the system thoroughly after installation.
• Confirm mounting hole spacing and bore requirements match the original unit.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary procedures and strict protocols to support consistent braking performance out of the box. Part number NM1745 is a new replacement master cylinder built for dependable hydraulic operation in the listed Buick, Cadillac, and Pontiac applications.