MPA Electrical B1209 Power Brake Booster

Remanufactured Vacuum Brake Booster

MPA Electrical B1209 is a remanufactured vacuum power brake booster for select GM A-body and G-body applications. It is built for drivers who need consistent brake assist and a firm, predictable pedal feel in classic Buick, Chevrolet, Oldsmobile, and Pontiac models.

Designed as a standard replacement, this booster uses a metal housing and a 10.84-inch diaphragm to deliver vacuum-assisted braking with minimal pedal effort. It is supplied without a master cylinder, brake pedal rod extension, gasket, seal, or mounting bracket.

Key Features

• Part number B1209
• Remanufactured vacuum booster for brake service replacement
• 10.84-inch diaphragm diameter for vacuum assist performance
• Metal housing construction
• 2 mounting studs with 3/8-16 master cylinder stud thread size
• Master cylinder not included
• Brake pedal rod extension not included
• Gasket or seal not included
• Front seal not included
• Interchanges with 18004082

Product Line Details

MPA Electrical remanufactured brake boosters are rebuilt and tested to restore vacuum sealing, pressure transfer, and braking assist performance. The B1209 follows that approach with treated replacement components and end-of-line testing to verify operation before release.

Detailed Description

MPA Electrical B1209 is a reman vac pwr brake booster w/o master cyl for 1979-1980 Buick Century, 1979-1980 Buick Regal, 1979-1980 Chevrolet El Camino, 1979-1980 Chevrolet Malibu, 1979-1980 Chevrolet Monte Carlo, 1979-1980 Oldsmobile Cutlass, 1979-1980 Oldsmobile Cutlass Calais, 1980 Oldsmobile Cutlass Cruiser, 1979-1980 Oldsmobile Cutlass Salon, 1979-1980 Oldsmobile Cutlass Supreme, 1979-1980 Pontiac Grand Am, 1979-1980 Pontiac Grand LeMans, 1979-1980 Pontiac Grand Prix, and 1979-1980 Pontiac LeMans. This part cross-references 18004082 for the same application. It is a direct-fit style vacuum brake booster replacement for vehicles that need restored pedal assist and stable braking response.

What It Helps Address

• Hard brake pedal feel caused by a weak or leaking booster
• Reduced vacuum assist during braking
• Inconsistent pedal response in older brake systems
• Loss of braking assist from worn internal diaphragm components
• Brake booster replacement during master cylinder service

Installation Notes and Tips

Verify master cylinder compatibility, mounting stud layout, and 3/8-16 thread requirements before installation. Transfer or source the master cylinder separately, since it is not included. Inspect vacuum supply, pedal linkage, and sealing surfaces during replacement to help ensure proper brake assist after installation.

Quality Assurance

MPA Electrical subjects each unit to 100% end-of-line testing using proprietary test equipment. New replacement and specially treated components are used to support vacuum sealing, pressure transfer, and consistent braking performance.