MPA Electrical B3394 Power Brake Booster

Remanufactured Vacuum Brake Booster for Volvo

MPA Electrical B3394 is a remanufactured vacuum power brake booster built for Volvo braking systems that need consistent assist and a firm pedal feel. It is engineered for standard replacement use and is designed to deliver strong vacuum seal performance and reliable pressure transfer.

This reman Vac Pwr Brake Booster w/o Master Cyl is a direct-fit service part for select Volvo 850, C70, S70, and V70 applications. The metal housing and 8x1.25 master cylinder stud thread size support OE-style fitment where the original booster has lost assist or vacuum integrity.

Key Features

• Remanufactured vacuum power brake booster
• Standard replacement brake service grade
• Metal housing construction
• Master cylinder not included
• Brake pedal rod extension not included
• Gasket or seal not included
• Front seal not included
• Mounting bracket not included
• 2 mounting studs
• Master cylinder stud thread size: 8x1.25

Product Line Details

MPA Electrical reman brake boosters are rebuilt and tested to restore braking assist performance for everyday driving conditions. The product line focuses on vacuum seal integrity, pressure transfer, and end-of-line verification so the booster is ready for service after remanufacturing.

Fitment

• Fits 1998-2000 Volvo C70, N/A
• Fits 1998-2000 Volvo S70, N/A
• Fits 1998-2000 Volvo V70, N/A
• Fits 1996-1997 Volvo 850, N/A

Common Problems This Part Addresses

• Hard brake pedal feel from loss of vacuum assist
• Reduced braking response during normal pedal application
• Vacuum leakage at the booster assembly
• Pressure transfer issues between pedal input and brake system
• Booster wear on aging Volvo brake systems

Installation Notes and Tips

Verify master cylinder stud thread size, mounting stud layout, and pedal rod configuration before installation. Because the master cylinder is not included, transfer or replace the master cylinder separately as needed and inspect the vacuum hose, check valve, and related brake components during service.

Quality Assurance

Each MPA Electrical brake booster is subjected to 100% end-of-line testing using proprietary test equipment to confirm vacuum seal performance and pressure transfer before release.

This part cross-references OE numbers 9438036 and 94380367 for the same application.