MPA Electrical NM55503 Brake Master Cylinder

Brake Master Cylinder for Front Disc Brake Applications

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM55503. It is a standard replacement master cylinder for select Dodge Attitude, Hyundai Accent, and Kia Rio models with front disc brakes.

Built with an aluminum master cylinder body, plastic reservoir, and included cap, this unit is configured for DOT 3 or DOT 4 brake fluid. The 0.812-inch bore diameter and 2-hole mounting layout match the specified OE-style application for direct hydraulic replacement.

Key Features

• MPA Electrical NM55503 brake master cylinder
• Standard replacement grade for hydraulic brake service
• Aluminum master cylinder construction with plastic reservoir
• Reservoir and cap included
• 0.812-inch bore diameter
• 2 mounting holes with 0.341-inch mounting hole diameter
• Uses DOT 3 or DOT 4 brake fluid
• New with front disc brakes application

Product Details

MPA Electrical brake master cylinders are engineered to restore braking performance by matching OE specifications through tested manufacturing processes and controlled inspection protocols. NM55503 is built for vehicles that require a front disc brake master cylinder and is listed for 2012-2019 Dodge Attitude, 2012-2017 Hyundai Accent, and 2012-2015 Kia Rio. This part cross-references Monroe Shocks & Struts (e.g., 58510-1R200) for the same application.

Compatible With 2012-2019 Dodge Attitude, new with front disc brakes; 2012-2017 Hyundai Accent, new with front disc brakes; and 2012-2015 Kia Rio, new with front disc brakes. The MPA Electrical NM55503 is a direct-fit brake master cylinder for drivers replacing a worn or leaking hydraulic unit on these front disc brake platforms.

Common Problems This Part Can Address

• Low or inconsistent brake pedal feel
• Internal master cylinder leakage
• Brake fluid loss at the hydraulic unit
• Reduced braking response from worn seals or bore wear
• Brake system performance issues on front disc brake vehicles

Installation Notes

• Verify vehicle fitment by year, make, model, and front disc brake configuration before installation.
• Bench bleeding the master cylinder before final installation helps remove trapped air from the hydraulic circuit.
• Transfer only the components required by your application; mounting hardware, push rod, brake booster, and seals are not included.
• Use clean DOT 3 or DOT 4 brake fluid and follow the vehicle service procedure for bleeding the system.

Quality Assurance

MPA Electrical tests each master cylinder against OE specifications using proprietary processes and strict inspection protocols to support consistent braking performance out of the box. Part number NM55503 is a new standard replacement brake master cylinder for the listed applications.