MPA Electrical B3127 Power Brake Booster

Vacuum Brake Booster for Volkswagen and Audi

MPA Electrical B3127 is a remanufactured vacuum power brake booster built for direct replacement in select Volkswagen and Audi applications. It is engineered to deliver strong braking assist with low pedal effort, helping restore consistent brake feel in daily driving.

This reman vac pwr brake booster w/o master cyl is built around a metal housing, a 10.67-inch diaphragm, and an 8 x 1.25 mm master cylinder stud thread size. It is a standard replacement brake service grade unit for vehicles that use a vacuum booster without an included master cylinder.

Key Features

• Remanufactured vacuum booster for brake assist restoration
• Standard replacement brake service grade
• Metal housing for OE-style fit and durability
• 10.67-inch diaphragm diameter for vacuum-assisted braking
• 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
• 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. B3127 follows that approach with specially treated replacement components and end-of-line testing to verify function before release. This part cross-references 1J1614106H and 1J1614106J for the same application.

Compatible With 2002-2010 Volkswagen Beetle, 2002-2008 Volkswagen Jetta, 2002-2007 Volkswagen Golf, 2007-2010 Volkswagen Golf City, 2007-2009 Volkswagen Jetta City, 2011-2013 Volkswagen Clasico, 2010-2011 Volkswagen Beetle Cabrio, 2004 Volkswagen R32, 2003-2006 Audi TT, and 2003-2006 Audi TT Quattro. MPA Electrical B3127 is also a direct-fit option for Volkswagen Beetle and Volkswagen Jetta brake booster replacement searches.

Common Problems This Part Can Address

• Hard brake pedal feel from a weak vacuum booster
• Reduced brake assist during normal stopping
• Inconsistent pedal response after booster wear
• Vacuum seal loss in the brake booster assembly
• Brake performance issues tied to a failing booster housing or diaphragm

Installation Notes and Tips

Verify master cylinder compatibility before installation, since this booster does not include a master cylinder. Confirm the 8 x 1.25 mm stud thread size, mounting stud count, and vehicle-specific brake pedal rod setup before assembly. For Volkswagen Beetle, Volkswagen Jetta, and Audi TT brake booster replacement jobs, compare the original unit to B3127 before final installation.

Quality Assurance

Each MPA Electrical brake booster is subjected to 100% end-of-line testing using proprietary equipment to confirm vacuum seal integrity and pressure transfer performance. The remanufactured construction and tested components support consistent brake assist in the listed Volkswagen and Audi applications.