MPA Electrical B1138 Power Brake Booster

Reman Vacuum Brake Booster for Ford, Lincoln, and Mazda

MPA Electrical B1138 is a remanufactured vacuum power brake booster built for direct replacement in select Ford, Lincoln, and Mazda applications. It is engineered to deliver strong braking assist with reduced pedal effort, helping restore consistent brake feel in vehicles such as the Ford Edge, Lincoln MKX, and Mazda CX-9.

This MPA Electrical brake booster is a standard replacement unit with a metal housing, an 11.28-inch diaphragm diameter, and an included brake pedal rod extension. It is supplied without a master cylinder, gasket or seal, front seal, or mounting bracket.

Key Features

• Vacuum booster design for power-assisted braking
• Remanufactured standard replacement part
• Metal housing for durable brake system service
• 11.28 in. diaphragm diameter for application-specific fitment
• Brake pedal rod extension included
• Master cylinder not included
• 2 mounting studs with 8 x 1.25 mm master cylinder stud thread size

Product Line Details

MPA Electrical reman brake boosters are rebuilt and tested to meet the demands of daily driving. The brand’s remanufacturing process uses treated replacement components to help maintain vacuum sealing, pressure transfer, and consistent assist performance. Each unit is end-of-line tested with proprietary equipment before release.

Detailed Description

MPA Electrical B1138 is a reman vac pwr brake booster w/o master cyl designed for vehicles that rely on vacuum-assisted braking. It is a direct-fit replacement for 2007-2010 Ford Edge, 2007-2010 Lincoln MKX, and 2007-2015 Mazda CX-9 applications. If you are searching for a reman vacuum brake booster for Ford Edge, Lincoln MKX brake booster replacement, or Mazda CX-9 power brake booster B1138, this unit matches those vehicle-specific needs.

This part cross-references AT4Z 2005-A for the same application. The B1138 part number is also useful when verifying the correct reman brake booster before ordering.

What It Helps Fix

• Hard brake pedal feel
• Reduced brake assist from a failing vacuum booster
• Inconsistent pedal response during braking
• Brake system performance loss caused by booster wear or internal seal issues
• Vacuum retention problems in the brake assist system

Installation Notes and Tips

Confirm vehicle fitment by year, make, and model before installation. Transfer or inspect related brake components as needed, and verify the master cylinder connection, pedal rod engagement, and vacuum supply condition during service. Because the master cylinder is not included, reuse or replace that component separately if required by the repair.

Fits 2007-2015 Mazda CX-9, N/A. Fits 2007-2010 Ford Edge, N/A. Fits 2007-2010 Lincoln MKX, N/A.

Quality Assurance

MPA Electrical reman brake boosters are 100% end-of-line tested using proprietary testing equipment to verify performance before shipment. B1138 is built as a remanufactured replacement brake booster for consistent vacuum assist and reliable brake pedal response.