MPA Electrical NM55171A Brake Master Cylinder

Brake Master Cylinder for Nissan Sentra

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM55171A. It is a standard replacement unit for 2003-2006 Nissan Sentra models with front disc brakes, built with an aluminum body, plastic reservoir, and DOT 3 fluid compatibility.

Key Features

• Fits 2003-2006 Nissan Sentra, N/A, with front disc brakes
• Brake master cylinder with 0.938 bore diameter
• Aluminum master cylinder construction with plastic reservoir
• Reservoir, cap, and gasket/seal included
• Standard replacement grade for brake hydraulic service
• Designed for DOT 3 brake fluid
• MPA Electrical part number NM55171A

Product Details

MPA Electrical NM55171A is a brake master cylinder engineered to restore hydraulic braking performance in the 2003-2006 Nissan Sentra. The unit is tested against OE specifications using controlled processes and sample-based validation, helping ensure proper fit and consistent brake pedal feel after installation. The front disc brake application and 0.938 bore diameter make this a direct-fit hydraulic replacement for the listed Sentra models.

The MPA Electrical New with front disc brakes product line focuses on replacement brake hydraulics built to match original equipment requirements. For buyers searching for a Nissan Sentra brake master cylinder, Sentra brake hydraulic replacement, or NM55171A master cylinder, this part provides the core components needed for a service repair without unnecessary extras.

Common Problems This Part Can Address

• Low or sinking brake pedal
• Internal master cylinder seal wear
• Brake fluid bypass causing reduced hydraulic pressure
• Uneven or inconsistent braking response
• Brake warning symptoms related to master cylinder failure

Installation Notes

Verify the vehicle is a 2003-2006 Nissan Sentra with front disc brakes before ordering. This master cylinder uses two mounting holes and does not include mounting hardware, brake booster, push rod, sensor, or brake pressure switch. Bench bleeding is recommended before installation, and the system should be filled with DOT 3 brake fluid only. Inspect the brake lines, reservoir seal, and mounting surfaces during replacement.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary procedures and strict inspection protocols to support consistent braking performance out of the box. Part number NM55171A is a new standard replacement brake master cylinder for the listed Nissan Sentra applications.