MPA Electrical NM4188 Brake Master Cylinder

Brake Master Cylinder for Silverado and Sierra

The MPA Electrical NM4188 brake master cylinder is a standard replacement hydraulic component for 2007 Chevrolet Silverado 1500 and 2007 GMC Sierra 1500 models with front disc brakes. It is built with an aluminum master cylinder body, plastic reservoir, and a 1.125-inch bore to restore consistent brake pedal response and hydraulic pressure.

MPA Electrical uses OE sample data and testing protocols to verify each unit against original specifications before it leaves the factory. This NM4188 master cylinder includes the reservoir, cap, and gasket or seal, and it uses DOT 3 brake fluid.

Key Features

• Direct replacement brake master cylinder for 2007 Chevrolet Silverado 1500 and 2007 GMC Sierra 1500
• 1.125-inch bore diameter for hydraulic brake system operation
• Aluminum master cylinder construction with plastic reservoir
• Reservoir, cap, and gasket or seal included
• Standard replacement grade for brake hydraulic service
• Two mounting holes with 0.436-inch mounting hole diameter
• Uses DOT 3 brake fluid
• MPA Electrical NM4188 part number for catalog matching and service lookup

Product Details

The NM4188 is a brake master cylinder for front disc brake applications on the 2007 Chevrolet Silverado 1500 and 2007 GMC Sierra 1500. It is engineered to restore braking performance by maintaining proper hydraulic pressure between the brake pedal and wheel brake circuits. The aluminum body helps provide a durable housing, while the plastic reservoir supports fluid storage for the brake system. This part cross-references GM 15183823 for the same application.

MPA Electrical’s front disc brake product line focuses on OE-style replacement hydraulic components for vehicles that need accurate fit and dependable brake pedal feel. If you are searching for an NM4188 brake master cylinder or a replacement master cylinder for a 2007 Silverado 1500 or 2007 Sierra 1500, this unit matches the listed application and configuration.

What It Helps Fix

• Low or inconsistent brake pedal feel
• Internal master cylinder leakage
• Brake fluid loss at the master cylinder
• Reduced hydraulic pressure in the brake system
• Brake performance issues related to a worn master cylinder

Installation Notes

Verify the vehicle is a 2007 Chevrolet Silverado 1500 or 2007 GMC Sierra 1500 with front disc brakes before installation. Confirm the bore size, mounting hole layout, and brake fluid type match the original unit. Transfer any required components not included with the assembly, bleed the brake system thoroughly after installation, and inspect all hydraulic connections for leaks.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using controlled procedures and sample-based reference data to support consistent out-of-box performance. The NM4188 is a new standard replacement part built for brake hydraulic service.