MPA Electrical B4204 Power Brake Booster

Overview

MPA Electrical B4204 is a remanufactured vacuum power brake booster built for direct brake assist replacement. It is engineered to deliver strong braking assist with reduced pedal effort, and it includes a gasket or seal for the assembly.

Fits 2013-2020 Volkswagen Passat, N/A. This B4204 brake booster is a standard replacement for drivers restoring vacuum-assisted brake performance on the Volkswagen Passat.

Key Features

• Vacuum booster design for brake assist.
• Remanufactured metal housing for replacement use.
• Gasket or seal included for the assembly.
• 8 x 1.25 master cylinder stud thread size.
• Brake service grade: standard replacement.

Detailed Description

The MPA Electrical B4204 power brake booster is a remanufactured vacuum unit intended to restore braking assist when the original booster no longer holds vacuum or delivers consistent pedal response. MPA states that the unit uses new replacement and specially treated components to help maintain vacuum sealing, pressure transfer, and overall performance. The B4204 is built without a master cylinder, so it is suited to applications where the existing master cylinder is reused or replaced separately.

Fitment is listed for the 2013-2020 Volkswagen Passat, N/A. If you are replacing a worn booster on a Volkswagen Passat, B4204 provides a direct-service solution for vacuum brake assist restoration.

What It Is Used For

• Hard brake pedal feel caused by booster wear or vacuum loss.
• Reduced braking assist during normal pedal application.
• Brake response issues related to a failing vacuum booster.
• Replacement of a remanufactured booster without a master cylinder.
• Service work on vacuum-assisted brake systems.

Installation Notes and Tips

Verify master cylinder compatibility before installation, since the master cylinder is not included. Confirm the 8 x 1.25 stud thread size and check the existing pedal rod and mounting points against the vehicle before assembly. Follow the vehicle service procedure for vacuum line inspection, brake system bleeding, and final pedal feel verification after installation.

Quality Assurance

MPA Electrical subjects each unit to 100% end-of-line testing using proprietary test equipment. The remanufactured construction and tested vacuum sealing are intended to support consistent brake assist performance.