MPA Electrical NM4303 Brake Master Cylinder

Brake Master Cylinder for Cadillac SRX

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM4303. It is a standard replacement unit for the 2011-2016 Cadillac SRX with front disc brakes, built with an aluminum body, plastic reservoir, and a 1.064-inch bore for direct hydraulic performance.

MPA Electrical’s New with front disc brakes product line focuses on OE-style brake hydraulics for vehicles that use front disc brake configurations. NM4303 is tested against OE specifications using controlled validation processes to help deliver reliable braking performance after installation.

Key Features

• Fits 2011-2016 Cadillac SRX, front disc brakes
• Part number NM4303
• Aluminum master cylinder body with plastic reservoir
• 1.064-inch master cylinder bore diameter
• DOT 3 brake fluid application
• Reservoir and cap included
• Gasket or seal included
• Standard replacement grade
• Two mounting holes with 0.767-inch mounting hole diameter

Detailed Description

This brake master cylinder is engineered for the Cadillac SRX brake hydraulic system and matches the vehicle’s front disc brake configuration for 2011-2016 model years. NM4303 is built as a direct replacement for worn or leaking master cylinders, helping restore hydraulic pressure transfer from the pedal to the brake system. The aluminum housing supports durability, while the included reservoir, cap, and seal simplify parts matching during service. This part cross-references Monroe Shocks & Struts (e.g., 19431944, 20819270) for the same application.

What It Helps Address

• Low or inconsistent brake pedal feel
• External brake fluid leakage at the master cylinder
• Internal hydraulic bypass that reduces braking response
• Brake warning symptoms tied to master cylinder wear
• Service replacement for aging hydraulic components on a Cadillac SRX

Installation Notes and Tips

Verify the vehicle is a 2011-2016 Cadillac SRX with front disc brakes before installation. Transfer or inspect related brake components as needed, and bleed the hydraulic system thoroughly after installation to remove air from the lines. Use DOT 3 brake fluid only, and confirm the mounting hole dimensions and bore size match the original unit before assembly.

Quality Assurance

MPA Electrical tests each unit against OE specifications using proprietary processes and strict protocols to support consistent braking performance out of the box. Part number NM4303 is a new standard replacement brake master cylinder for service use on the Cadillac SRX.