MPA Electrical NM55281 Brake Master Cylinder

Brake Master Cylinder for Audi and Volkswagen

Restore consistent brake pedal response with this new MPA Electrical brake master cylinder, part number NM55281. Built as a standard replacement for vehicles with front disc brakes, it is engineered for direct hydraulic performance on select Audi A4, Audi A4 Quattro, Audi A6, Audi A6 Quattro, Audi S6, and Volkswagen Passat applications.

MPA Electrical’s New with front disc brakes product line focuses on replacement brake hydraulics that are tested against OE specifications using controlled sample-based processes. This NM55281 master cylinder is a new aluminum unit with a 1-inch bore and DOT 4 fluid compatibility.

Key Features

• Standard replacement brake master cylinder
• Aluminum construction for OE-style fit and function
• 1-inch master cylinder bore diameter
• Gasket or seal included
• Two mounting holes with 0.856-inch mounting hole diameter
• DOT 4 brake fluid type
• New condition
• Interchanges with 8E0611021

Detailed Description

The NM55281 brake master cylinder is built for vehicles equipped with front disc brakes and is compatible with 2002-2009 Audi A4, 2002-2009 Audi A4 Quattro, 2002-2005 Volkswagen Passat, 1997 Volkswagen Passat, 2004 Audi A6, 2002 Audi A6, 2002-2004 Audi A6 Quattro, and 2002-2004 Audi S6. It is a direct hydraulic replacement for restoring brake pressure transfer in the master cylinder circuit, with an aluminum body and seal included for service-ready installation.

This part number NM55281 cross-references 8E0611021 for the same application.

What It Helps Address

• Low or inconsistent brake pedal feel
• Internal hydraulic leakage in the master cylinder
• Brake fluid bypass that reduces stopping response
• Loss of braking performance from worn master cylinder seals
• Hydraulic pressure issues in front disc brake systems

Installation Notes and Tips

Verify the vehicle is equipped with front disc brakes before ordering. This master cylinder does not include the reservoir, brake booster, push rod, sensor, brake pressure switch, mounting hardware, or mounting bracket. Use the correct DOT 4 brake fluid and bleed the hydraulic system thoroughly after installation to remove trapped air and restore pedal consistency.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary processes and strict protocols to help ensure consistent braking performance out of the box. The NM55281 is a new standard replacement part built to restore original hydraulic function on the listed Audi and Volkswagen applications.