MPA Electrical B3158 Power Brake Booster

Remanufactured Vacuum Brake Booster for Toyota RAV4

MPA Electrical B3158 is a remanufactured vacuum power brake booster built for 2001-2005 Toyota RAV4 applications. It is engineered to deliver strong braking assist with reduced pedal effort, helping restore consistent brake feel in daily driving and stop-and-go traffic.

The MPA Electrical brake booster line focuses on replacement units that are tested for vacuum sealing and pressure transfer. This B3158 reman vac pwr brake booster w/o master cyl is a standard replacement part for Toyota RAV4 brake service where the booster is the failed component and the master cylinder is reused.

Key Features

• Remanufactured vacuum power brake booster
• Standard replacement brake service grade
• Metal housing construction
• 10.69 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 B3158 is designed for drivers who need dependable brake assist in a vacuum booster replacement. It is remanufactured with treated replacement components to support vacuum sealing and pressure transfer, and each unit is end-of-line tested with proprietary equipment before release. For 2001-2005 Toyota RAV4 brake repair, this part number provides a direct-fit vacuum booster solution when the original booster has lost assist or developed a vacuum leak.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. Search terms such as Toyota RAV4 brake booster replacement, reman vacuum brake booster for 2001-2005 Toyota RAV4, and MPA Electrical B3158 help identify the correct part for the vehicle platform.

What It Helps Fix

• Hard brake pedal feel from reduced vacuum assist
• Brake booster vacuum leaks
• Inconsistent pedal response during braking
• Loss of braking assist after booster wear or failure
• Brake service needs on 2001-2005 Toyota RAV4 models

Installation Notes and Tips

Verify the master cylinder, pedal rod connection, and vacuum supply condition before installation. This B3158 does not include the master cylinder, so reuse or replace related components as needed based on inspection. Confirm fitment against the vehicle’s year and brake system configuration before assembly on 2001-2005 Toyota RAV4 applications.

Quality Assurance

MPA Electrical remanufactured brake boosters are tested at the end of production using proprietary equipment to verify performance, vacuum sealing, and pressure transfer. The brand’s remanufacturing process uses new replacement and specially treated components to support consistent brake assist in service.