MPA Electrical M4105 Brake Master Cylinder

Brake Master Cylinder for Front Disc Brake Applications

MPA Electrical M4105 is a remanufactured brake master cylinder for vehicles equipped with front disc brakes. It is built as a standard replacement with a 1.0625-inch bore and an aluminum body to restore hydraulic brake response on select Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, Saab 9-7x, and Buick Rainier applications.

This M4105 reman with front disc brakes line is tested against OE specifications using proprietary processes and strict inspection protocols. The result is a direct-fit brake hydraulic component for drivers replacing a worn or leaking master cylinder on supported GM and related platforms.

Key Features

• Remanufactured brake master cylinder
• Standard replacement grade
• 1.0625-inch master cylinder bore diameter
• Aluminum master cylinder construction
• Uses DOT 3 brake fluid
• 2 mounting holes with 0.42-inch mounting hole diameter
• No reservoir, cap, booster, sensor, or push rod included
• No mounting hardware, gasket, seal, or bracket included

Detailed Description

MPA Electrical M4105 is engineered to restore braking performance in front-disc-brake vehicles that need a replacement master cylinder. The remanufacturing process uses OE sample data and testing protocols to verify the unit against original specifications, helping maintain consistent hydraulic pressure and pedal feel after installation. This part cross-references 15142479 and 8151424790 for the same application.

Compatible With 2006-2008 Chevrolet Trailblazer, reman with front disc brakes; 2006-2008 GMC Envoy, reman with front disc brakes; 2006-2008 Isuzu Ascender, reman with front disc brakes; 2006-2008 Saab 9-7x, reman with front disc brakes; 2006-2007 Buick Rainier, reman with front disc brakes; 2006 Chevrolet Trailblazer EXT, reman with front disc brakes; and 2006 GMC Envoy XL, reman with front disc brakes.

Common Problems This Part Can Address

• Low or sinking brake pedal caused by internal master cylinder wear
• Brake fluid leakage at the master cylinder body or seals
• Uneven hydraulic pressure affecting brake response
• Soft pedal feel after master cylinder deterioration
• Loss of braking consistency on front disc brake systems

Installation Notes and Tips

Bench bleed the master cylinder before installation and use fresh DOT 3 brake fluid. Verify bore size, mounting hole spacing, and brake booster interface before installation, since this unit does not include a reservoir, cap, booster, push rod, or mounting hardware. After installation, bleed the brake system thoroughly and confirm a firm pedal before returning the vehicle to service.

Quality Assurance

MPA Electrical remanufactures brake master cylinders using OE sample references and controlled test procedures to check performance against OE specifications. Each unit is inspected to support consistent braking performance out of the box.