MPA Electrical NM4212 Brake Master Cylinder

Brake Master Cylinder for Express and Savana

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM4212. It is a standard replacement unit built for 2009-2014 Chevrolet Express 1500 and 2009-2014 GMC Savana 1500 models with front disc brakes.

MPA Electrical NM4212 is engineered as a direct brake hydraulics replacement with a 1.313-inch bore, aluminum body, plastic reservoir, and included reservoir cap. It is filled with DOT 3 fluid compatibility and is supplied as a new unit for service replacement on the Chevrolet Express 1500 and GMC Savana 1500 platform.

Key Features

• Standard replacement brake master cylinder
• 1.313-inch master cylinder bore diameter
• Aluminum master cylinder construction
• Plastic reservoir with reservoir included
• Master cylinder cap included
• Two mounting holes with 0.421-inch mounting hole diameter
• DOT 3 brake fluid type
• New condition
• Interchanges with part number 25809242

Detailed Description

MPA Electrical NM4212 is a brake master cylinder designed to restore hydraulic braking performance by replacing a worn or leaking original unit. Using OE sample data and testing protocols referenced by the manufacturer, this master cylinder is built to match OE specifications for consistent brake pedal feel and fluid pressure delivery. It is a direct service part for 2009-2014 Chevrolet Express 1500 and 2009-2014 GMC Savana 1500 applications with front disc brakes.

The aluminum housing, plastic reservoir, and included cap provide a complete master cylinder assembly for brake system service. This part number NM4212 is a practical choice when diagnosing low pedal, internal bypass, or fluid loss in the master cylinder on Express 1500 and Savana 1500 vans.

What It Can Help Fix

• Soft or sinking brake pedal
• Brake fluid leakage at the master cylinder
• Uneven hydraulic pressure in the brake system
• Internal seal wear causing pedal bypass
• Reduced braking response on front disc brake vehicles

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and brake configuration before installation. This master cylinder does not include mounting hardware, a brake booster, push rod, mounting bracket, brake pressure switch, or gasket/seal. Bench bleeding and a full brake system bleed are standard service steps after installation to remove trapped air and restore proper pedal feel.

Compatible With 2009-2014 Chevrolet Express 1500, front disc brakes, and 2009-2014 GMC Savana 1500, front disc brakes. Part number NM4212 is also referenced for interchange with 25809242.

Quality Assurance

MPA Electrical states that its brake master cylinders are tested against OE specifications using proprietary processes and strict protocols to support consistent braking performance out of the box.