MPA Electrical NM55565 Brake Master Cylinder

Brake Master Cylinder for BMW X5 and X6

Restore hydraulic braking performance with this new brake master cylinder from MPA Electrical. Built as a standard replacement for BMW X5 and BMW X6 applications with front disc brakes, it is engineered to match OE specifications for consistent pedal response and dependable brake pressure.

MPA Electrical’s New with front disc brakes product line focuses on direct-fit brake hydraulics for vehicles that need accurate restoration of factory braking feel. Part number NM55565 is a new aluminum master cylinder with a 1.061-inch bore and DOT 4 fluid compatibility.

Key Features

• Fits 2007-2018 BMW X5, N/A, with front disc brakes
• Fits 2008-2019 BMW X6, N/A, with front disc brakes
• Standard replacement brake master cylinder
• Aluminum master cylinder construction
• 1.061-inch bore diameter
• Designed for DOT 4 brake fluid
• Gasket or seal included
• Two mounting holes with 0.355-inch mounting hole diameter
• New condition

Detailed Description

The NM55565 brake master cylinder is built to restore hydraulic pressure in BMW X5 and BMW X6 braking systems. It is a direct replacement for vehicles equipped with front disc brakes and uses an aluminum body for a lightweight, corrosion-resistant design. This part cross-references BMW 34336772930 for the same application. The NM55565 is supplied without a reservoir, brake booster, push rod, sensor, or mounting hardware, so existing vehicle components are reused where applicable.

Common Issues This Part Can Address

• Low or inconsistent brake pedal feel
• Internal hydraulic leakage in the master cylinder
• Reduced braking response after fluid contamination or wear
• Brake warning symptoms tied to master cylinder failure
• Loss of braking performance in BMW X5 or BMW X6 front disc brake systems

Installation Notes and Tips

• Verify vehicle fitment by year, model, and front disc brake configuration before installation.
• Bench bleed the master cylinder before connecting brake lines to reduce trapped air.
• Use clean DOT 4 brake fluid only.
• Inspect the brake booster, lines, and seals for wear before completing the repair.
• Transfer reusable components from the original system as needed, since reservoir and mounting hardware are not included.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using controlled procedures and sample-based validation from its OE reference library. Part number NM55565 is a new standard replacement built to restore braking performance on BMW X5 and BMW X6 applications with front disc brakes.