MPA Electrical B1054 Power Brake Booster

Vacuum Brake Booster for Chrysler and Dodge

MPA Electrical B1054 is a remanufactured vacuum power brake booster for select Chrysler, Dodge, and Plymouth vehicles. It is built for standard replacement use and is engineered to deliver strong braking assist with reduced pedal effort.

This reman vac pwr brake booster w/o master cyl is designed for applications such as Chrysler LeBaron, Dodge Shadow, and Plymouth Sundance, making it a direct-fit service part for many 1983-1995 front-wheel-drive platforms.

Key Features

• Brand: MPA Electrical
• Part number: B1054
• Remanufactured vacuum booster
• Dual-diaphragm design for braking assist
• Metal housing construction
• Standard replacement brake service grade
• Master cylinder not included
• Brake pedal rod extension not included
• Mounting bracket not included
• 2 mounting studs with 8 x 1.25 mm master cylinder stud thread size

Product Details

MPA Electrical reman vac pwr brake booster w/o master cyl units are rebuilt with new replacement and specially treated components to help maintain vacuum sealing, pressure transfer, and consistent pedal response. The dual diaphragm and 224.79 mm (8.85 in.) diaphragm diameter support vacuum-assisted braking performance across the listed Chrysler, Dodge, and Plymouth applications. Part number B1054 is also cross-referenced to 3880421 and 4294567 for the same application.

What It Helps Fix

• Hard brake pedal feel
• Reduced brake assist from a leaking vacuum booster
• Inconsistent pedal response during braking
• Loss of vacuum seal in the booster assembly
• Brake assist issues on aging Chrysler, Dodge, and Plymouth platforms

Installation Notes

• Verify master cylinder fitment separately, since the master cylinder is not included.
• Confirm the vehicle uses a vacuum booster and the correct 8 x 1.25 mm master cylinder stud thread size.
• Inspect vacuum supply, check valves, and brake lines before installation.
• Match the booster to the vehicle’s original mounting and pedal connection points before final assembly.
• Use the listed fitment to confirm application on Chrysler LeBaron, Dodge Shadow, Plymouth Sundance, and related models.

Quality Assurance

Each MPA Electrical brake booster is 100% end-of-line tested with proprietary test equipment before release. That testing process is used to verify vacuum seal integrity and pressure transfer performance for remanufactured brake booster service.