MPA Electrical NM55461 Brake Master Cylinder

Brake Master Cylinder for Mini Cooper Applications

Restore consistent brake pedal response with this new brake master cylinder from MPA Electrical. Built as a standard replacement for Mini Cooper, Cooper Countryman, and Cooper Paceman models with front disc brakes, part number NM55461 is engineered to match OE specifications for dependable hydraulic performance.

MPA Electrical’s New with front disc brakes product line focuses on direct-fit brake hydraulic replacement parts that are tested against OE references for dimensional and functional consistency. This brake master cylinder uses an aluminum body, a 0.940 bore diameter, and includes a gasket or seal for service-ready installation.

Key Features

• Standard replacement brake master cylinder for Mini Cooper brake hydraulic service
• Aluminum master cylinder construction
• 0.940 bore diameter for OE-style hydraulic output
• Two mounting holes with 0.357 mounting hole diameter
• Gasket or seal included
• New condition replacement part
• Part number NM55461

Detailed Product Information

This brake master cylinder is intended for 2007-2015 Mini Cooper, 2011-2016 Mini Cooper Countryman, and 2013-2016 Mini Cooper Paceman models with front disc brakes. It is a direct replacement hydraulic component for vehicles experiencing reduced pedal firmness, internal leakage, or inconsistent brake pressure. The aluminum housing helps keep weight down while maintaining the structural requirements of a brake system master cylinder. NM55461 also cross-references BMW/Mini OE part number 34 33 6 786 585 for the same application.

What This Part Helps Address

• Low or spongy brake pedal feel
• Brake fluid leakage at the master cylinder
• Uneven or delayed hydraulic brake response
• Loss of braking performance caused by internal seal wear
• Brake system service needs on Mini Cooper front disc brake models

Installation Notes and Tips

Verify vehicle fitment by year, model, and front disc brake configuration before installation. This master cylinder does not include the brake booster, reservoir, cap, push rod, sensor, pressure switch, mounting hardware, or mounting bracket. Always inspect the brake booster, lines, and seals during replacement, and bleed the hydraulic system thoroughly after installation to remove trapped air.

Quality Assurance

MPA Electrical states that its brake master cylinders are tested against OE specifications using controlled inspection and validation processes. That approach helps ensure consistent braking performance out of the box for Mini Cooper, Cooper Countryman, and Cooper Paceman applications.