MPA Electrical B1158 Power Brake Booster

Vacuum Brake Booster for Corolla and Prizm

MPA Electrical B1158 is a remanufactured vacuum power brake booster built for direct replacement service on select 1998-2002 Toyota Corolla and Chevrolet Prizm applications. It is engineered to deliver strong braking assist with reduced pedal effort, helping restore consistent brake feel in everyday driving.

As part of the MPA Electrical reman vac pwr brake booster w/o master cyl line, this unit focuses on vacuum sealing, pressure transfer, and end-of-line verification for dependable brake system performance. The booster is supplied without the master cylinder, matching the listed application requirements.

Key Features

• Part number B1158 remanufactured vacuum power brake booster
• Standard replacement brake service grade
• Vacuum booster type for power-assisted braking
• Metal housing construction
• 247.4 mm / 9.74 in diaphragm diameter
• 8 x 1.25 mm master cylinder stud thread size
• 2 mounting studs
• Master cylinder not included
• Brake pedal rod extension not included
• Mounting bracket, gasket or seal, and front seal not included

Detailed Description

MPA Electrical B1158 is a remanufactured vacuum brake booster designed for 1998-2002 Toyota Corolla and 1998-2002 Chevrolet Prizm vehicles. It is built to restore brake assist by using engine vacuum to reduce pedal effort, which helps maintain predictable stopping response in daily driving and stop-and-go traffic. The metal housing and treated replacement components support vacuum sealing and pressure transfer, while 100% end-of-line testing verifies each unit before release. If you are replacing a worn booster on a Toyota Corolla or Chevrolet Prizm, B1158 provides a direct-fit service part for the listed applications.

This part cross-references OE-style numbers such as 446101E590 and 94857028 for the same application.

Common Problems This Part Can Help Solve

• Hard brake pedal feel caused by a weak or leaking booster
• Reduced brake assist during normal driving
• Vacuum loss affecting pedal response
• Inconsistent braking effort after booster wear
• Brake system performance issues on 1998-2002 Toyota Corolla and Chevrolet Prizm models

Installation Notes and Tips

Verify the master cylinder stud thread size, mounting stud layout, and diaphragm diameter before installation. This booster is listed without the master cylinder, brake pedal rod extension, gasket or seal, front seal, or mounting bracket, so reuse or source the correct related components as needed for the vehicle. Confirm vacuum hose condition and inspect the brake pedal linkage and master cylinder before completing the repair.

Fits 1998-2002 Toyota Corolla, N/A. Fits 1998-2002 Chevrolet Prizm, N/A.

Quality Assurance

MPA Electrical remanufactures this booster with specially treated replacement components and tests every unit at the end of the line using proprietary equipment to confirm performance and vacuum integrity.