MPA Electrical B3048 Power Brake Booster

Overview

MPA Electrical B3048 is a remanufactured vacuum power brake booster built for braking systems that need strong assist with low pedal effort. It is a standard replacement unit for select Toyota Sienna applications and is supplied without a master cylinder.

This booster uses a metal housing, a 247.14 mm (9.73 in.) diaphragm, and an 8 x 1.25 mm master cylinder stud thread size. MPA Electrical B3048 is tested at the end of the production process to verify performance before release.

Key Features

• Remanufactured vacuum brake booster for standard replacement service
• Metal housing construction for brake system durability
• 247.14 mm (9.73 in.) diaphragm diameter
• Master cylinder not included
• Brake pedal rod extension, gasket, seal, and mounting bracket not included
• Two mounting studs with 8 x 1.25 mm master cylinder stud thread size

Product Details

MPA Electrical B3048 is a reman vac pwr brake booster designed to restore vacuum-assisted braking performance in compatible Toyota Sienna brake systems. The remanufactured construction combines new replacement and specially treated components to support vacuum sealing and pressure transfer, while the vacuum booster design helps reduce pedal effort during braking. If you are replacing a worn booster on a Toyota Sienna, this part number B3048 provides a direct service-style solution for the brake assist assembly.

This part cross-references Toyota OE numbers 4461008010 and 4461008020 for the same application.

What It Helps Solve

• Hard brake pedal feel caused by a weak booster
• Reduced brake assist from vacuum seal loss
• Inconsistent pedal response during braking
• Replacement needs for a worn remanufactured booster assembly

Installation Notes

Fits 1998-2003 Toyota Sienna, N/A. Verify master cylinder compatibility, stud thread size, and mounting points before installation. This booster is supplied without a master cylinder, brake pedal rod extension, gasket, seal, or mounting bracket.

Quality Assurance

MPA Electrical subjects each unit to 100% end-of-line testing using proprietary test equipment. The remanufactured design uses replacement and specially treated components to support consistent braking assist and pressure transfer.