MPA Electrical B3629 Power Brake Booster

Remanufactured Vacuum Brake Booster for Subaru Legacy and Outback

Restore consistent brake assist with this remanufactured vacuum power brake booster from MPA Electrical. Built for 2005-2009 Subaru Legacy and 2005-2009 Subaru Outback applications, part number B3629 is engineered for smooth pedal response and reliable vacuum sealing in standard replacement service.

MPA Electrical’s Reman Vac Pwr Brake Booster w/o Master Cyl line focuses on remanufactured brake boosters that are tested for pressure transfer and pedal assist performance. This B3629 unit follows that approach with treated replacement components and end-of-line testing for dependable operation.

Key Features

• Remanufactured vacuum power brake booster
• Standard replacement brake service grade
• Metal housing construction
• 250.19 mm / 9.85 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

Detailed Description

MPA Electrical B3629 is a remanufactured vacuum brake booster designed for Subaru Legacy and Subaru Outback models from 2005 through 2009. It is built to deliver braking assist with reduced pedal effort by using a vacuum-operated design and a metal housing for durable service. The booster is supplied without a master cylinder, so it is intended for applications where the existing master cylinder is retained or replaced separately.

This part cross-references Subaru OE numbers 26402AG04A and 26402AG05A for the same application. For shoppers searching for a reman vacuum power brake booster for 2005-2009 Subaru Legacy or 2005-2009 Subaru Outback, B3629 provides a direct replacement option with the specified mounting and thread dimensions.

What It Helps Address

• Hard brake pedal feel
• Reduced brake assist from a failing vacuum booster
• Inconsistent pedal response during braking
• Vacuum seal loss in the brake booster assembly
• Brake system performance issues tied to booster wear

Installation Notes and Tips

Verify the vehicle’s original booster style, diaphragm size, mounting stud layout, and master cylinder thread specification before installation. Because the master cylinder is not included, transfer or replace that component separately as needed. Inspect vacuum hoses, check valves, and pedal linkage condition during service to help confirm proper brake assist after installation.

Quality Assurance

MPA Electrical remanufactures this brake booster with replacement and specially treated components, then subjects each unit to 100% end-of-line testing using proprietary equipment to confirm vacuum seal integrity, pressure transfer, and performance.