MPA Electrical B1086 Power Brake Booster

Remanufactured Vacuum Brake Booster for Ford Focus

MPA Electrical B1086 is a remanufactured vacuum power brake booster for 2000-2008 Ford Focus applications. It is built for standard replacement service and is engineered to deliver strong braking assist with reduced pedal effort.

The MPA Electrical brake booster line focuses on vacuum seal integrity, consistent pressure transfer, and end-of-line testing. This B1086 unit uses a single diaphragm design with a 10.76-inch diaphragm diameter, a metal housing, and two mounting studs for OE-style service replacement.

Key Features

• Remanufactured vacuum power brake booster
• Standard replacement brake service grade
• Single diaphragm design
• 10.76 in. (273.3 mm) diaphragm diameter
• Metal housing construction
• Master cylinder not included
• Brake pedal rod extension not included
• Mounting bracket not included
• 8 x 1.25 mm master cylinder stud thread size
• Fits 2000-2008 Ford Focus, N/A

Product Details

MPA Electrical B1086 is a reman Vac Pwr Brake Booster w/o Master Cyl designed for Ford Focus brake system service. It is a direct-fit vacuum booster replacement for 2000-2008 Ford Focus models and is built to restore brake assist performance when the original booster shows signs of vacuum loss or reduced pedal response. This part cross-references OE-style numbers 5S4Z2005A and YS4Z 2005-AA for the same application.

Common Issues This Part Addresses

• Hard brake pedal feel
• Reduced vacuum-assisted braking
• Brake assist loss from internal diaphragm or seal wear
• Inconsistent pedal response during braking
• Booster-related vacuum leakage

Installation Notes

Verify master cylinder fitment, stud thread size, and pedal rod configuration before installation. This B1086 brake booster does not include the master cylinder, gasket or seal, front seal, mounting bracket, or brake pedal rod extension. Confirm the vehicle’s vacuum supply and inspect related brake components during service on Ford Focus models.

Quality Assurance

MPA Electrical subjects each brake booster to 100% end-of-line testing using proprietary test equipment. The remanufacturing process includes specially treated replacement components to support vacuum sealing, pressure transfer, and consistent braking assist.