MPA Electrical B3702 Power Brake Booster

Remanufactured Vacuum Brake Booster for Lexus

MPA Electrical B3702 is a remanufactured vacuum power brake booster built for Lexus applications that need consistent braking assist and low pedal effort. This reman vac pwr brake booster w/o master cyl is engineered for dependable vacuum sealing, stable pressure transfer, and OE-style fitment on select Lexus IS350, GS350, GS460, GS300, and GS430 models.

Key Features

• Remanufactured vacuum booster with standard replacement service grade
• Housing material: metal
• 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 with 8x1.25 mm master cylinder stud thread size
• 100% end-of-line tested with proprietary equipment

Product Details

MPA Electrical B3702 is part of the Reman Vac Pwr Brake Booster w/o Master Cyl product line, focused on remanufactured brake assist components for direct replacement service. The booster is designed to restore vacuum-assisted braking performance by helping reduce pedal effort while maintaining reliable assist under everyday driving conditions. This part cross-references OE-style numbers such as 4461030A20 and 4461053380 for the same application. B3702 is a practical replacement choice when servicing the brake booster on Lexus IS350 and Lexus GS-series vehicles.

Vehicle Fitment

• Fits 2006-2015 Lexus IS350, N/A
• Fits 2007-2011 Lexus GS350, N/A
• Fits 2008-2009 Lexus GS460, N/A
• Fits 2006 Lexus GS300, N/A
• Fits 2006 Lexus GS430, N/A

Common Problems This Part Can Address

• Hard brake pedal feel from a weak or leaking booster
• Reduced braking assist during normal stop-and-go driving
• Vacuum loss caused by worn internal booster components
• Inconsistent pedal response in Lexus brake system service
• Need for a remanufactured replacement brake booster without the master cylinder

Installation Notes

Verify master cylinder compatibility before installation, since the master cylinder is not included. Confirm the 8x1.25 mm stud thread size and 2-stud mounting layout match the original unit. Inspect vacuum lines, pedal linkage, and sealing surfaces during brake service, and transfer any required components from the original assembly as needed.

Quality Assurance

MPA Electrical subjects each booster to 100% end-of-line testing using proprietary test equipment. New replacement and specially treated internal components are used to help maintain vacuum seal integrity and consistent pressure transfer in service.