MPA Electrical B1165 Power Brake Booster

Reman Vacuum Power Brake Booster

MPA Electrical B1165 is a remanufactured vacuum power brake booster for vehicles that need consistent brake assist and a firm, predictable pedal feel. This standard replacement booster is built with a metal housing and a 10.82-inch diaphragm to support reliable vacuum transfer in everyday driving.

Compatible with select Jeep Grand Wagoneer, Jeep J10, Jeep J20, Buick Riviera, Cadillac Eldorado, Cadillac Seville, Oldsmobile Toronado, Jeep Cherokee, and Jeep Wagoneer applications, B1165 is a direct-fit brake booster replacement for vehicles using a vacuum-assisted setup without a master cylinder.

Key Features

• Remanufactured vacuum power brake booster
• Standard replacement brake service grade
• 10.82-inch diaphragm diameter for vacuum assist
• Metal housing for durable brake system service
• 2 mounting studs with 10 x 1.50 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

Product Details

MPA Electrical’s Reman Vac Pwr Brake Booster w/o Master Cyl line focuses on remanufactured brake assist components that are tested for pressure transfer and vacuum sealing performance. For B1165, that means a rebuilt vacuum booster designed to restore brake pedal assist on older Jeep, Buick, Cadillac, and Oldsmobile platforms that rely on vacuum power brakes. This part cross-references OE-style numbers including 18008673 and 83500986 for the same application.

Common Problems This Part Can Address

• Hard brake pedal feel
• Reduced brake assist from vacuum loss
• Inconsistent pedal response during braking
• Booster housing wear or internal diaphragm failure
• Brake system performance loss on vacuum-assisted vehicles

Installation Notes

Verify vacuum brake booster style, diaphragm size, and master cylinder stud thread size before installation. B1165 is supplied without a master cylinder, so transfer or replace the master cylinder separately as needed. Confirm pedal rod length, firewall mounting, and vacuum hose condition during service to help ensure proper brake operation after replacement.

Quality Assurance

MPA Electrical subjects each brake booster to end-of-line testing using proprietary equipment to check vacuum seal integrity and pressure transfer performance. The remanufactured construction and tested output support dependable brake assist for service replacement applications.