MPA Electrical B3056 Power Brake Booster

Vacuum Brake Booster for Nissan 240SX

Restore consistent brake assist with this remanufactured vacuum power brake booster from MPA Electrical. Built for 1989-1994 Nissan 240SX applications, Part Number B3056 is a standard replacement for drivers needing firm vacuum assist and reduced pedal effort.

MPA Electrical’s Reman Vac Pwr Brake Booster w/o Master Cyl line focuses on remanufactured brake boosters that are tested for vacuum sealing and pressure transfer performance. This unit is supplied without the master cylinder and uses a metal housing with a 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
• Master cylinder not included
• Brake pedal rod extension not included
• Mounting bracket not included
• Two mounting studs with 8 x 1.25 mm master cylinder stud thread size
• Fits 1989-1994 Nissan 240SX, N/A

Detailed Description

MPA Electrical B3056 is a reman vacuum power brake booster engineered for direct replacement in 1989-1994 Nissan 240SX models. It is built to deliver vacuum-assisted braking with minimal pedal effort, helping maintain predictable brake feel in daily driving and stop-and-go traffic. The remanufactured design uses new replacement and specially treated components to support vacuum seal integrity, pressure transfer, and consistent operation.

This brake booster is a direct-fit service part for Nissan 240SX brake system repair when the original booster shows signs of reduced assist or vacuum leakage. Part Number B3056 also cross-references 4721042F00 and 4721042F10 for the same application.

What It Helps Address

• Hard brake pedal feel from a weak or leaking booster
• Reduced vacuum assist during braking
• Inconsistent pedal response
• Brake system performance loss caused by booster seal wear
• Replacement needs on 1989-1994 Nissan 240SX brake service

Installation Notes and Tips

Verify master cylinder compatibility before installation, since the master cylinder is not included. Confirm the 8 x 1.25 mm master cylinder stud thread size and the two-stud mounting layout match the vehicle setup. Inspect vacuum hoses, check valves, and related brake components during service to help ensure proper system operation after replacement.

Quality Assurance

MPA Electrical subjects each unit to 100% end-of-line testing using proprietary test equipment. That process checks the booster for vacuum seal integrity and functional performance before release.