MPA Electrical B5122 Power Brake Booster

Hydraulic Brake Booster for 1979 Oldsmobile

MPA Electrical B5122 is a remanufactured hydraulic power brake booster built for standard replacement service. It is engineered to deliver strong braking assist with reduced pedal effort, making it a direct-fit option for 1979 Oldsmobile Cutlass, Cutlass Calais, and Cutlass Supreme applications that use a hydraulic booster without a master cylinder.

Key Features

• Remanufactured hydraulic power brake booster
• Standard replacement brake service grade
• Housing constructed from metal
• Master cylinder not included
• Brake pedal rod extension not included
• Front seal not included
• 10x1.50 master cylinder stud thread size
• 2 mounting studs for installation
• Interchange reference: 563874

Product Details

The MPA Electrical BrandLine, Reman Hyd Pwr Brake Booster w/o Master Cyl, focuses on hydraulic booster assemblies for vehicles that rely on pressure-assisted braking rather than a vacuum-only setup. Part number B5122 is remanufactured and tested to support reliable pressure transfer and consistent vacuum sealing performance after refurbishment. For 1979 Oldsmobile Cutlass, Cutlass Calais, and Cutlass Supreme models, this booster provides the correct configuration for vehicles specified without a master cylinder.

This part cross-references 563874 for the same application.

What It Helps Solve

• Hard brake pedal feel caused by a weak or failing hydraulic booster
• Reduced braking assist during normal driving or stop-and-go traffic
• Pressure transfer issues in the brake assist system
• Brake performance loss from worn internal booster components
• Fitment problems when replacing a booster on 1979 Oldsmobile Cutlass, Cutlass Calais, or Cutlass Supreme

Installation Notes and Tips

Verify that the vehicle uses a hydraulic booster and that the replacement specification is for a unit without a master cylinder. Confirm the 10x1.50 master cylinder stud thread size and the 2-stud mounting pattern before installation. Because the master cylinder, mounting bracket, front seal, and pedal rod extension are not included, reuse or source the correct related components as needed for the vehicle.

Quality Assurance

MPA Electrical remanufactures and end-of-line tests each brake booster with proprietary equipment to verify performance before release. That process helps confirm proper assist function and pressure integrity for the B5122 hydraulic brake booster.