MPA Electrical B3367 Power Brake Booster

Remanufactured Brake Booster for Lexus IS250

MPA Electrical B3367 is a remanufactured vacuum power brake booster built for 2006-2015 Lexus IS250 applications. It is engineered to deliver strong braking assist with low pedal effort, helping restore consistent brake feel in daily driving and stop-and-go traffic.

The MPA Electrical Reman Vac Pwr Brake Booster w/o Master Cyl line focuses on replacement boosters that are tested for vacuum sealing and pressure transfer. This B3367 unit follows that approach with remanufactured and specially treated components, plus end-of-line testing for output consistency.

Key Features

• Part number B3367
• Vacuum-style power brake booster
• Standard replacement brake service grade
• Remanufactured metal housing
• 10.7 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
• Gasket or seal not included
• Mounting bracket not included

Detailed Description

MPA Electrical B3367 is a reman vacuum brake booster for Lexus IS250 models from 2006 through 2015. It is designed to restore brake assist by using engine vacuum to reduce pedal effort, which is important when the original booster shows signs of internal leakage, weak assist, or inconsistent pedal response. This part cross-references OE numbers 4461053280 and 4461053281 for the same application.

Built with a metal housing and a 10.7-inch diaphragm, this booster is intended for direct replacement use where the master cylinder is reused or sourced separately. The remanufacturing process includes replacement and treatment of key components, followed by 100% end-of-line testing to verify vacuum seal integrity and pressure transfer performance. Use B3367 when servicing a Lexus IS250 brake system that requires a vacuum power brake booster without a master cylinder.

What It Helps Fix

• Hard brake pedal feel
• Reduced brake assist during normal driving
• Vacuum leakage in the booster assembly
• Uneven or inconsistent pedal response
• Brake system performance loss caused by a worn booster

Installation Notes and Tips

Verify the vehicle is a 2006-2015 Lexus IS250 before ordering. This booster does not include the master cylinder, brake pedal rod extension, gasket or seal, front seal, or mounting bracket, so reuse or source the required related components as needed. Confirm the 2-stud mounting layout and 8 x 1.25 mm master cylinder stud thread size during installation.

After installation, inspect vacuum hose routing, check for leaks, and verify pedal height and brake assist operation before returning the vehicle to service.

Quality Assurance

MPA Electrical remanufactured brake boosters are tested at the end of production using proprietary equipment to confirm vacuum sealing and pressure transfer performance. The B3367 is built as a standard replacement part for Lexus IS250 brake service.