MPA Electrical NM55494 Brake Master Cylinder

Brake Master Cylinder for Kia Sorento

This MPA Electrical brake master cylinder is a standard replacement for 2003-2006 Kia Sorento models with front disc brakes. Built with an aluminum body, plastic reservoir, and included cap, it is engineered to restore hydraulic braking performance with OE-based testing and specification checks.

Part number NM55494 is a direct-fit brake hydraulics replacement for the Kia Sorento, with fitment coverage for 2003, 2004, 2005, and 2006 model years. It uses DOT 3 or DOT 4 brake fluid and is supplied as a new unit.

Key Features

• Fits 2003-2006 Kia Sorento, front disc brakes
• Brake master cylinder for brake hydraulic system repair
• Aluminum master cylinder body with plastic reservoir
• 1.063 in. bore diameter for OE-style hydraulic output
• Master cylinder cap included
• Standard replacement grade
• New part number NM55494

Product Details

MPA Electrical NM55494 is a brake master cylinder built for the Kia Sorento brake system. The unit is tested against OE specifications using controlled processes and sample-based validation to help ensure consistent pedal response and braking performance after installation. The design includes a reservoir and cap, while omitting items such as mounting hardware, push rod, brake booster, and pressure switch components.

This part cross-references Monroe Shocks & Struts (e.g., 172286) for the same application. If you are replacing a worn or leaking master cylinder on a 2003-2006 Kia Sorento, NM55494 provides the hydraulic foundation needed to restore brake pressure and pedal feel.

Common Problems This Part Can Address

• Soft or sinking brake pedal
• External brake fluid leakage at the master cylinder
• Uneven or inconsistent brake pressure
• Loss of braking response from internal seal wear
• Brake warning symptoms related to hydraulic failure

Installation Notes

Before installation, confirm vehicle fitment for 2003-2006 Kia Sorento models with front disc brakes and verify the bore size, mounting hole layout, and fluid type requirements. Bench bleeding is recommended before connecting brake lines to help remove trapped air from the master cylinder. Use clean DOT 3 or DOT 4 brake fluid and inspect the rest of the hydraulic system for contamination, leaks, or worn components.

Quality Assurance

MPA Electrical uses OE sample references and strict testing protocols to validate brake master cylinders against original specifications. That process supports consistent fit and braking performance for NM55494 on the Kia Sorento platform.