MPA Electrical B1128 Power Brake Booster

Reliable Vacuum Power Brake Booster Replacement

The MPA Electrical Reman Vac Pwr Brake Booster w/o Master Cyl (Part Number B1128) offers a dependable solution for restoring brake assist performance in select classic vehicles. Designed as a remanufactured unit, this vacuum power brake booster is engineered to meet standard replacement requirements for improved braking response.

• Standard replacement grade for reliable brake service
• Vacuum booster type with dual diaphragm design
• Metal housing for durability and long service life
• Diaphragm diameter of 11.02 inches (279.91 mm) for effective brake assist
• Compatible with Buick, Chevrolet, Oldsmobile, and Pontiac models
• Does not include master cylinder, gasket, or mounting hardware
• Features 2 mounting studs and 3/8-16 master cylinder stud thread size

Product Line Overview: Reman Vac Pwr Brake Booster w/o Master Cyl

This product is part of the MPA Electrical Reman Vac Pwr Brake Booster w/o Master Cyl line, which focuses on remanufactured vacuum power brake boosters without the master cylinder included. This line provides a cost-effective option for restoring brake booster function while allowing customers to retain their existing master cylinder and related components.

Detailed Product Description

The B1128 power brake booster utilizes a dual diaphragm design housed in a durable metal casing to provide consistent vacuum-assisted braking. With a diaphragm diameter of 11.02 inches (279.91 mm), it delivers the necessary force multiplication to reduce pedal effort. This remanufactured unit is intended as a standard replacement part, ensuring compatibility and performance for classic vehicles such as the Buick LeSabre, Chevrolet Caprice, Oldsmobile Delta 88, and Pontiac Bonneville. Note that this booster does not include the master cylinder, gasket, or mounting bracket, so these components must be sourced separately if needed.

Common Applications and Problem Resolution

• Restores brake assist in vehicles with failing or weak power brake boosters
• Addresses hard brake pedal issues caused by vacuum leaks or diaphragm failure
• Eliminates inconsistent brake pedal feel due to worn internal components
• Replaces noisy or sticking brake boosters that affect braking smoothness
• Improves overall brake system responsiveness in Buick, Chevrolet, Oldsmobile, and Pontiac models

Installation Notes and Tips

Installation requires removal of the existing power brake booster and careful alignment of the mounting studs. Since the master cylinder and mounting hardware are not included, ensure these parts are compatible and in good condition before installation. Verify the 3/8-16 master cylinder stud thread size matches your vehicle’s master cylinder. Proper vacuum hose connections and brake pedal rod adjustments are essential for optimal performance.

Quality Assurance and Warranty

This remanufactured power brake booster undergoes thorough inspection and testing to meet standard brake service grade requirements. The metal housing and dual diaphragm design contribute to durability and consistent operation. Warranty details are provided by MPA Electrical and typically cover defects in materials and workmanship under normal use conditions.