MPA Electrical NM55225 Brake Master Cylinder

Brake Master Cylinder for Toyota Avalon

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM55225. It is a standard replacement for select Toyota Avalon models with front disc brakes and is built with an aluminum body, plastic reservoir, and DOT 3 fluid compatibility.

Fits 2000 Toyota Avalon, N/A. Fits 2002-2004 Toyota Avalon, N/A. This part cross-references Toyota OE numbers 4720107051 and 4720107070 for the same application.

Key Features

• Standard replacement brake master cylinder for hydraulic brake service
• Aluminum master cylinder body with plastic reservoir
• 0.875 in. bore diameter for the listed Avalon applications
• Reservoir and cap included; gasket or seal included
• Uses DOT 3 brake fluid
• Two mounting holes with 0.348 in. mounting hole diameter
• New condition, with front disc brake fitment noted by application

Product Details

MPA Electrical NM55225 is engineered to restore braking performance by matching OE specifications through sample-based testing and controlled validation processes. For Toyota Avalon owners needing a brake master cylinder replacement, this unit provides the core hydraulic components needed to rebuild pedal pressure and maintain proper brake system operation. The aluminum construction helps provide a durable housing, while the included reservoir, cap, and seal support a complete service replacement.

MPA Electrical’s New with front disc brakes product line focuses on application-specific brake hydraulics for vehicles equipped with front disc brake systems. For Toyota Avalon brake master cylinder replacement searches, NM55225 is the direct part number to reference when matching the listed fitment.

Common Problems This Part Can Address

• Low or inconsistent brake pedal feel
• Internal hydraulic leakage in the master cylinder
• Brake fluid loss at the master cylinder assembly
• Reduced braking response during normal driving
• Need for OE-style replacement on a Toyota Avalon with front disc brakes

Installation Notes and Tips

Verify the vehicle’s brake configuration before installation, since this part is listed for Avalon models with front disc brakes. Confirm bore size, mounting hole layout, and reservoir style against the removed unit before assembly. Bench bleeding the master cylinder before final installation helps reduce trapped air in the hydraulic system and supports proper pedal feel after service.

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. NM55225 is a new standard replacement part built for the listed Toyota Avalon applications.