MPA Electrical B3025 Power Brake Booster

Remanufactured Vacuum Brake Booster

The MPA Electrical B3025 is a remanufactured vacuum power brake booster for select Toyota applications. It is built for drivers who need consistent brake assist and a firm, predictable pedal feel in 1986-1989 Toyota 4Runner and 1986-1988 Toyota Pickup models.

MPA Electrical reman brake boosters are rebuilt with replacement and specially treated components to help maintain vacuum sealing, pressure transfer, and braking response. This B3025 unit is a standard replacement vacuum booster with a metal housing and 242.82 mm (9.56 in.) diaphragm diameter.

Key Features

• Remanufactured vacuum power brake booster
• Standard replacement brake service grade
• Metal housing construction
• 242.82 mm / 9.56 in. diaphragm diameter
• 2 mounting studs with 8 x 1.25 mm master cylinder stud thread size
• Master cylinder not included
• Brake pedal rod extension not included
• Mounting bracket, gasket or seal, and front seal not included

Product Details

MPA Electrical’s reman vac pwr brake booster w/o master cyl line focuses on restoring vacuum-assisted braking performance with rebuilt components that are tested before release. Part number B3025 is engineered for direct replacement use on Toyota 4Runner and Toyota Pickup brake systems that require a vacuum booster without an attached master cylinder. This part cross-references 4461035810 for the same application.

Common Brake Issues It Can Address

• Hard brake pedal feel from a weak or leaking booster
• Reduced brake assist during normal stopping
• Vacuum loss affecting pedal response
• Inconsistent braking effort after booster wear
• Replacement needs on remanufactured brake booster service jobs

Installation Notes

Verify the master cylinder stud thread size, mounting stud layout, and booster dimensions before installation. Because the master cylinder is not included, transfer or replace related brake components as needed during service. Confirm vacuum hose condition and inspect the brake pedal linkage and mounting points for wear before final assembly. Fits 1986-1989 Toyota 4Runner, N/A. Fits 1986-1988 Toyota Pickup, N/A.

Quality Assurance

MPA Electrical reman brake boosters are subjected to 100% end-of-line testing using proprietary test equipment to verify performance before release. The remanufacturing process uses new replacement and specially treated components to support vacuum seal integrity and pressure transfer.