MPA Electrical NM55655 Brake Master Cylinder

Brake Master Cylinder for Mazda 3

This MPA Electrical brake master cylinder is a standard replacement for vehicles with front disc brakes. It is built to restore hydraulic braking response and is tested against OE specifications for consistent performance. Part number NM55655 is a direct-fit service option for the Mazda 3 application listed below.

Key Features

• Standard replacement brake master cylinder for hydraulic brake service
• Aluminum master cylinder body with a plastic reservoir
• Reservoir, cap, and gasket or seal included
• 0.813 bore diameter for the specified application
• Uses DOT 3 brake fluid
• New condition with two mounting holes

Detailed Description

MPA Electrical NM55655 is engineered to restore braking performance by matching OE specifications through testing based on an extensive OE sample library. The aluminum construction and included reservoir assembly support a clean replacement for the original hydraulic unit. This brake master cylinder is listed for 2014-2018 Mazda 3 models with front disc brakes, making it a fitment-specific solution for the Mazda 3 brake hydraulic system. The NM55655 part number is also referenced by BHY1-43-40Z and BHY2-43-40Z for the same application.

What It Helps Solve

• Low or inconsistent brake pedal response
• Internal hydraulic leakage in the master cylinder
• Brake fluid loss at the reservoir or seals
• Reduced braking performance from a worn master cylinder

Installation Notes and Tips

Verify the vehicle is listed as 2014-2018 Mazda 3 with front disc brakes before ordering. This unit does not include mounting hardware, a brake booster, or a push rod. Use the specified DOT 3 fluid and bleed the brake system after installation to remove trapped air and restore proper pedal feel.

Quality Assurance

MPA Electrical tests each unit against OE specifications using proprietary processes and strict protocols to support consistent braking performance out of the box.