MPA Electrical NM1496 Brake Master Cylinder

Brake Master Cylinder for Front Disc Brake Applications

The MPA Electrical NM1496 brake master cylinder is a standard replacement for select 1971-1972 full-size Buick, Chevrolet, Oldsmobile, and Pontiac models 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 pressure and pedal response.

MPA Electrical uses OE sample data and testing protocols to verify each unit against original specifications, helping deliver dependable braking performance on the vehicle right out of the box. This NM1496 master cylinder is a direct service part for classic GM platforms that require DOT 3 brake fluid and a two-hole mounting pattern.

Key Features

• Standard replacement brake master cylinder for front disc brake vehicles
• Cast iron construction for durability and OE-style fitment
• 1.125-inch bore diameter for proper hydraulic output
• Integral reservoir design with reservoir included
• Master cylinder cap included
• Two mounting holes with 0.397-inch mounting hole diameter
• Uses DOT 3 brake fluid
• New condition part number NM1496

Detailed Description

The MPA Electrical NM1496 is built for drivers restoring braking performance on 1971-1972 Buick LeSabre and Riviera, Chevrolet Bel Air, Caprice, and Impala, Oldsmobile 98, Custom Cruiser, and Delta 88, plus Pontiac Bonneville and Catalina models equipped with front disc brakes. The cast iron master cylinder body and integral reservoir support a factory-style hydraulic layout, while the 1.125-inch bore helps maintain the correct pedal feel and brake system pressure for these applications. This part cross-references 5473993 and 6263169 for the same application.

What It Helps Solve

• Low or inconsistent brake pedal pressure
• Internal master cylinder wear that affects braking response
• Brake fluid leakage from a failing hydraulic unit
• Uneven or delayed brake engagement
• Restoration needs on classic GM front disc brake systems

Installation Notes and Tips

• Verify vehicle fitment by year, make, model, and front disc brake configuration before installation.
• Bench bleed the master cylinder before connecting brake lines to reduce trapped air in the system.
• Use DOT 3 brake fluid only, as specified.
• Inspect brake lines, fittings, and booster condition during replacement.
• Mounting hardware, push rod, brake booster, seals, and brake pressure switch are not included.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using controlled procedures and an OE sample library to help ensure consistent hydraulic performance and proper operation. The NM1496 is a new standard replacement part designed for dependable service on the listed applications.