MPA Electrical M49212 Brake Master Cylinder

Brake Master Cylinder for Classic GM Drum Brake Applications

The MPA Electrical M49212 remanufactured brake master cylinder is built for restoring hydraulic brake performance on select classic Buick, Oldsmobile, and Pontiac vehicles. It is a standard replacement unit with a 1-inch bore, cast iron construction, integral reservoir, and included cap and push rod for a direct-service brake hydraulic repair.

Compatible With 1962-1966 Pontiac Bonneville, Catalina, and Grand Prix; 1964-1966 Buick Skylark; 1964-1966 Oldsmobile Cutlass; and 1964-1966 Pontiac GTO, LeMans, and Tempest with front drum brakes. This part number is M49212.

Key Features

• Remanufactured brake master cylinder for standard replacement service
• 1-inch master cylinder bore diameter for listed applications
• Cast iron master cylinder body for classic brake system service
• Integral reservoir design with reservoir included
• Master cylinder cap included
• Push rod included
• Two mounting holes with 0.4-inch mounting hole diameter
• No brake booster included
• No mounting hardware, gasket, seal, sensor, or brake pressure switch included

Product Details

MPA Electrical reman brake master cylinders are processed against OE specifications using sample-based testing and controlled inspection protocols to help restore consistent braking performance after installation. The M49212 is a remanufactured cast iron master cylinder for front drum brake setups, making it a direct-fit hydraulic service part for classic GM vehicles that require this configuration. The M49212 part number is also cross-referenced to 5464725 for the same application.

What It Helps Fix

• Low or inconsistent brake pedal response
• Internal master cylinder leakage
• Brake fluid bypass causing poor hydraulic pressure
• Spongy pedal feel from worn master cylinder components
• Brake system performance loss on front drum brake vehicles

Installation Notes and Tips

Verify front drum brake configuration before installation. Bench bleed the master cylinder before connecting brake lines, and inspect the brake lines, wheel cylinders, and fluid condition at the same time. Confirm push rod fitment and mounting hole alignment on the vehicle before final assembly.

Quality Assurance

This remanufactured brake master cylinder is tested to OE-based specifications and strict internal protocols to support consistent hydraulic performance out of the box. It is a standard replacement part for classic Buick, Oldsmobile, and Pontiac brake service.