MPA Electrical B1237 Power Brake Booster

Reman Vacuum Brake Booster for Chevrolet Full-Size Cars

MPA Electrical B1237 is a remanufactured vacuum power brake booster built for 1971-1974 Chevrolet Bel Air, Caprice, and Impala applications. It is engineered for consistent vacuum assist and reduced pedal effort, making it a direct replacement for worn or weak booster units.

The MPA Electrical brake booster line focuses on remanufactured replacement units with treated internal components, verified vacuum sealing, and end-of-line testing. For Chevrolet Bel Air, Caprice, and Impala owners, B1237 provides a standard replacement solution for restoring brake assist performance.

• Vacuum booster design for power brake systems
• Standard replacement brake service grade
• Remanufactured metal housing
• 10.65 in. diaphragm diameter (270.51 mm)
• 2 mounting studs with 10 x 1.5 mm master cylinder stud thread size
• Master cylinder not included
• Brake pedal rod extension not included
• Gasket or seal not included
• Front seal not included
• Mounting bracket not included

MPA Electrical B1237 is a reman vac pwr brake booster w/o master cyl for drivers replacing a leaking, weak, or unresponsive booster on classic Chevrolet full-size cars. It is built to restore vacuum-assisted braking performance on 1971-1974 Chevrolet Bel Air, 1971-1974 Chevrolet Caprice, and 1971-1974 Chevrolet Impala models while maintaining the original vacuum booster format and mounting style.

Common Brake Issues This Booster Addresses

• Hard brake pedal feel caused by reduced vacuum assist
• Delayed or inconsistent brake response from a failing booster
• Vacuum leakage at the booster housing or diaphragm
• Loss of pedal assist after booster wear or contamination
• Brake performance decline on restored or maintained classic Chevrolet full-size vehicles

Installation Notes and Fitment

Compatible with 1971-1974 Chevrolet Bel Air, 1971-1974 Chevrolet Caprice, and 1971-1974 Chevrolet Impala. Verify master cylinder stud thread size, mounting stud layout, and pedal linkage before installation. Because the master cylinder is not included, transfer or source the correct matching components separately. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Each MPA Electrical brake booster is subjected to 100% end-of-line testing using proprietary test equipment to confirm vacuum seal integrity and pressure transfer performance. The remanufactured construction uses new replacement and specially treated components to support reliable braking assist in service.