MPA Electrical B3374 Power Brake Booster

Reman Vacuum Brake Booster for Mazda 5

MPA Electrical B3374 is a remanufactured vacuum power brake booster built for Mazda 5 applications from 2006-2010 and 2012-2015. It is engineered to deliver strong braking assist with reduced pedal effort, helping restore consistent brake feel in daily driving.

The MPA Electrical brake booster line focuses on replacement units that are tested for vacuum sealing and pressure transfer. This reman vac pwr brake booster w/o master cyl is a direct-fit service part for Mazda 5 brake system repair when the booster is the failed component.

Key Features

• Remanufactured vacuum power brake booster
• Standard replacement brake service grade
• Designed for Mazda 5 brake system applications
• Metal housing construction
• Brake pedal rod extension included
• Master cylinder not included
• 8x1.25 master cylinder stud thread size
• Two mounting studs
• Product condition: remanufactured

Detailed Description

MPA Electrical B3374 is a vacuum brake booster replacement for 2006-2010 Mazda 5 and 2012-2015 Mazda 5 models. It is built to restore vacuum-assisted braking performance by improving pedal assist and maintaining reliable pressure transfer through the brake booster assembly. This part number, B3374, is a practical choice when replacing a worn or leaking booster on a Mazda 5 brake system.

The remanufactured design uses treated replacement components to support vacuum seal integrity and consistent operation. The booster is supplied without a master cylinder, so the existing master cylinder can be retained when serviceable. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Fix

• Hard brake pedal feel
• Reduced brake assist from vacuum loss
• Brake booster leakage
• Inconsistent pedal response
• Brake system performance loss on Mazda 5 vehicles

Installation Notes and Tips

Verify the master cylinder stud thread size is 8x1.25 before installation. Confirm the existing master cylinder, pedal rod connection, and mounting points match the vehicle’s original booster setup. Because the master cylinder is not included, inspect the current master cylinder for wear, leakage, or contamination before reassembly. Fitment includes 2006-2010 Mazda 5 and 2012-2015 Mazda 5 applications.

Quality Assurance

MPA Electrical subjects each brake booster to 100% end-of-line testing with proprietary equipment to check sealing and performance before release. The remanufactured construction is intended to provide dependable brake assist for Mazda 5 service replacement needs.