MPA Electrical NM55329A Brake Master Cylinder

Brake Master Cylinder for Toyota Highlander

Restore hydraulic braking performance with this MPA Electrical brake master cylinder for the 2004-2007 Toyota Highlander with front disc brakes. Part number NM55329A is a standard replacement built with an aluminum body, plastic reservoir, and DOT 3 fluid compatibility for direct service replacement needs.

MPA Electrical’s New with front disc brakes product line focuses on OE-style brake hydraulic replacements for vehicles that use front disc brake configurations. This NM55329A master cylinder is tested against OE specifications using controlled procedures and sample-based validation to help deliver consistent pedal response after installation.

Key Features

• Fits 2004-2007 Toyota Highlander, N/A, with front disc brakes
• Brake master cylinder, part number NM55329A
• Standard replacement grade for brake hydraulic service
• Aluminum master cylinder construction with plastic reservoir
• 0.875 in. bore diameter for OE-style hydraulic output
• Reservoir included with cap and gasket/seal included
• Uses DOT 3 brake fluid
• Two mounting holes with 0.360 in. mounting hole diameter
• Interchanges with 4702848040 and 4702848041

Detailed Description

This brake master cylinder is engineered for the Toyota Highlander application listed above and is built to restore braking performance in a direct replacement format. The aluminum cylinder body, integrated plastic reservoir, and 0.875-inch bore diameter support stable hydraulic pressure for everyday braking service. NM55329A is a practical choice when replacing a worn or leaking master cylinder on a 2004-2007 Toyota Highlander with front disc brakes.

The unit includes the reservoir, cap, and gasket/seal, while mounting hardware, brake booster, push rod, sensor, and brake pressure switch are not included. This part cross-references 4702848040 and 4702848041 for the same application.

What This Part Helps Solve

• Low or inconsistent brake pedal feel
• External brake fluid leakage at the master cylinder
• Internal hydraulic bypass that reduces braking response
• Brake warning symptoms related to master cylinder wear
• Loss of braking performance from an aging hydraulic unit

Installation Notes and Tips

Before installation, confirm the vehicle is a 2004-2007 Toyota Highlander with front disc brakes and verify the bore, mounting hole layout, and reservoir configuration match the original unit. Bench bleeding the master cylinder before final installation helps remove trapped air from the hydraulic circuit. Use DOT 3 brake fluid only, and inspect the brake lines, booster interface, and reservoir seals during service.

Quality Assurance

MPA Electrical tests each unit against OE specifications using proprietary processes and strict protocols to help ensure consistent braking performance out of the box. This NM55329A is a new standard replacement brake master cylinder built for dependable hydraulic service on the Toyota Highlander platform.