MPA Electrical M1923 Brake Master Cylinder

Brake Master Cylinder for GM Front Disc Brake Applications

Restore consistent brake pedal response with this remanufactured brake master cylinder from MPA Electrical. Built for front disc brake applications, Part Number M1923 is a standard replacement for select Chevrolet S10, Chevrolet S10 Blazer, GMC S15, GMC S15 Jimmy, GMC Sonoma, and Oldsmobile Bravada models.

MPA Electrical remanufactures brake master cylinders using OE sample references and testing protocols that verify performance against OE specifications before the unit leaves the factory.

Key Features

• Remanufactured brake master cylinder for front disc brake setups
• Aluminum master cylinder construction
• 1.417 in. bore diameter for the specified brake system application
• Standard replacement grade
• 2 mounting holes with 0.422 in. mounting hole diameter
• Reservoir, cap, brake booster, push rod, gasket/seal, sensor, and mounting hardware are not included

Detailed Description

MPA Electrical M1923 is a remanufactured brake master cylinder engineered to restore hydraulic braking performance on GM compact truck and SUV platforms. It is listed for 1983-1994 Chevrolet S10 and Chevrolet S10 Blazer, 1983-1991 GMC S15 Jimmy, 1983-1990 GMC S15, 1991-1994 GMC Sonoma, and 1991-1994 Oldsmobile Bravada with front disc brakes. This part cross-references OE numbers 18009879 and 18013433 for the same application.

The aluminum body helps keep the unit lightweight while maintaining the correct bore size and mounting layout for the original brake system. Part Number M1923 is intended for drivers replacing a worn or leaking master cylinder on a Chevrolet S10, GMC Sonoma, or related GM truck/SUV platform with front disc brakes.

What This Part Helps Address

• Low or sinking brake pedal feel
• External brake fluid leakage at the master cylinder
• Uneven or delayed hydraulic brake response
• Internal seal wear that affects pedal pressure
• Brake system performance loss on front disc brake vehicles

Installation Notes and Tips

Verify the bore diameter, mounting hole spacing, and brake system configuration before installation. Because the reservoir, cap, brake booster, push rod, gasket/seal, and mounting hardware are not included, transfer or source the required related components as needed for the vehicle. After installation, bleed the brake system thoroughly and inspect all hydraulic connections for leaks.

Quality Assurance

MPA Electrical remanufactures brake master cylinders using OE sample references and controlled testing against OE specifications to help ensure consistent hydraulic performance out of the box. Part Number M1923 is a remanufactured standard replacement built for the listed GM applications.