MPA Electrical NM55521 Brake Master Cylinder

Brake Master Cylinder for Toyota Prius

Restore consistent brake pedal response with this MPA Electrical brake master cylinder for the 2004-2009 Toyota Prius with front disc brakes. This standard replacement unit is built with an aluminum body, a 0.75-inch bore, and a preinstalled push rod for direct hydraulic system service.

MPA Electrical’s New with front disc brakes product line focuses on replacement brake hydraulics that are tested against OE specifications using sample-based validation and controlled inspection processes. For a Toyota Prius brake master cylinder replacement, NM55521 is built to match the original hydraulic function needed for dependable braking performance.

Key Features

• Fits 2004-2009 Toyota Prius, N/A, with front disc brakes
• Brake master cylinder, standard replacement grade
• Aluminum construction for brake hydraulic service
• 0.75-inch master cylinder bore diameter
• Push rod included
• Two mounting holes with 0.352-inch mounting hole diameter
• New product condition
• Part number NM55521

Detailed Description

This brake master cylinder is engineered for the Toyota Prius braking system and is intended to restore hydraulic pressure transfer from the pedal to the brake circuits. The aluminum housing and 0.75-inch bore support the original brake system layout, while the included push rod helps simplify replacement of the master cylinder assembly. NM55521 is a practical choice when servicing a 2004-2009 Toyota Prius with front disc brakes and replacing a worn or leaking master cylinder.

This part cross-references Toyota 4720047020 and 4720147040 for the same application.

What It Helps Fix

• Low or inconsistent brake pedal feel
• Internal master cylinder leakage
• Brake fluid loss at the hydraulic unit
• Uneven hydraulic pressure delivery
• Brake performance loss from a worn master cylinder

Installation Notes and Tips

Verify the vehicle is a 2004-2009 Toyota Prius with front disc brakes before installation. This master cylinder does not include a reservoir, cap, gasket or seal, mounting hardware, brake booster, sensor, or brake pressure switch. Bleed the brake system thoroughly after installation and confirm all hydraulic connections are secure before returning the vehicle to service.

Quality Assurance

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