MPA Electrical B3388 Power Brake Booster

Reman Vacuum Brake Booster for Lexus IS300

Restore consistent brake assist with this remanufactured vacuum power brake booster from MPA Electrical. Built for the 2001 Lexus IS300, Part Number B3388 is engineered to deliver strong vacuum sealing and reliable pressure transfer for a firm, responsive pedal feel.

MPA Electrical’s Reman Vac Pwr Brake Booster w/o Master Cyl line focuses on replacement boosters that are tested for end-of-line performance and built with treated replacement components for dependable operation. This B3388 unit is a direct-fit style solution for drivers servicing a 2001 Lexus IS300 brake booster replacement without a master cylinder.

Key Features

• Remanufactured vacuum power brake booster
• Standard replacement brake service grade
• Designed without master cylinder included
• Metal housing construction
• 8.75 in. diaphragm diameter
• Two mounting studs with 8 x 1.25 mm master cylinder stud thread size
• 100% end-of-line tested by the manufacturer
• Part Number B3388

Detailed Description

MPA Electrical B3388 is a remanufactured vacuum brake booster built for braking systems that rely on vacuum assist to reduce pedal effort. It is engineered to maintain a strong vacuum seal and consistent pressure transfer, helping the brake system respond smoothly under normal driving and stop-and-go conditions. This unit is listed for the 2001 Lexus IS300 and is supplied without a master cylinder, gasket, seal, front seal, mounting bracket, or brake pedal rod extension.

For buyers searching for a 2001 Lexus IS300 brake booster replacement, Lexus IS300 vacuum booster B3388, or reman power brake booster without master cylinder, this part provides a focused OE-style service solution. It cross-references Toyota/Lexus OE number 4461053080 for the same application.

What This Part Helps Address

• Hard brake pedal feel caused by a weak or leaking booster
• Reduced brake assist during normal driving
• Vacuum loss that affects pedal response
• Inconsistent braking effort from a worn booster diaphragm or seal
• Brake system service needs on a 2001 Lexus IS300

Installation Notes and Tips

Verify the existing booster configuration before installation, including vacuum type, mounting stud layout, and master cylinder stud thread size. Because the master cylinder is not included, transfer or replace related brake components as needed during service. After installation, check for vacuum leaks, proper pedal travel, and correct brake operation before returning the vehicle to service.

Quality Assurance

MPA Electrical subjects each unit to 100% end-of-line testing using proprietary test equipment. The remanufacturing process uses new replacement and specially treated components to support vacuum sealing, pressure transfer, and overall brake assist performance.