MPA Electrical B1148 Power Brake Booster

Reman Vacuum Power Brake Booster

Restore consistent brake assist with this remanufactured vacuum power brake booster from MPA Electrical. Built for 1977-1978 full-size and intermediate GM applications, it delivers reduced pedal effort and dependable vacuum sealing for everyday braking performance.

MPA Electrical’s Reman Vac Pwr Brake Booster w/o Master Cyl, part number B1148, is a standard replacement vacuum booster with a metal housing and a 9.28-inch diaphragm diameter. It is remanufactured, tested at the end of the line, and supplied without a master cylinder, brake pedal rod extension, gasket, seal, or mounting bracket.

• Brake service grade: standard replacement
• Vacuum booster design for power-assisted braking
• Metal housing construction
• 9.28 in. diaphragm diameter
• 2 mounting studs
• Master cylinder stud thread size: 3/8-16
• Remanufactured and 100% end-of-line tested

Product Details

MPA Electrical B1148 is engineered for reliable vacuum assist and consistent pressure transfer in vehicles that use a vacuum-operated power brake booster. The remanufactured design uses new replacement and specially treated components to help maintain vacuum seal integrity and stable pedal response. This part cross-references 18015932 for the same application. It is a direct service option for 1977 Buick LeSabre and Riviera, 1977 Cadillac DeVille and Fleetwood, 1977 Chevrolet Caprice and Impala, 1977 Oldsmobile 98 and Delta 88, 1977 Pontiac Bonneville, Catalina, Laurentian, and Parisienne, plus 1978 Buick Century and Regal, 1978 Chevrolet El Camino, Malibu, and Monte Carlo, 1978 Oldsmobile Cutlass, Cutlass Calais, Cutlass Salon, and Cutlass Supreme, and 1978 Pontiac Grand Am, Grand LeMans, Grand Prix, and LeMans.

Common Brake Issues It Can Address

• Hard brake pedal feel from weak vacuum assist
• Reduced braking response during normal driving
• Vacuum seal loss in an aging booster assembly
• Inconsistent pedal effort caused by worn internal components
• Brake system service needs on original vacuum booster applications

Installation Notes

Verify master cylinder fitment, pushrod setup, and mounting stud spacing before installation. This booster does not include a master cylinder, brake pedal rod extension, gasket, seal, or mounting bracket, so reuse or source the correct related components as needed. Confirm the 3/8-16 master cylinder stud thread size and match the vehicle’s original vacuum brake booster configuration before final assembly.

Quality Assurance

MPA Electrical remanufactures this booster with replacement and specially treated components, then subjects every unit to 100% end-of-line testing using proprietary equipment to verify performance before release.