MPA Electrical M4081 Brake Master Cylinder

Brake Master Cylinder for Cadillac Front Disc Brake Applications

Restore consistent brake pedal response with this remanufactured brake master cylinder from MPA Electrical. Built for Cadillac SRX, STS, and CTS models with front disc brakes, this standard replacement is engineered to return hydraulic braking performance to OE-style operation.

MPA Electrical’s reman with front disc brakes product line focuses on brake hydraulics that are tested against OE specifications using proprietary processes and an OE sample library. Part number M4081 is a remanufactured aluminum master cylinder with a 1-inch bore and DOT 3 fluid compatibility.

Key Features

• Remanufactured brake master cylinder for front disc brake applications
• Fits 2005-2009 Cadillac SRX, 2005-2008 Cadillac STS, and 2005-2007 Cadillac CTS
• 1-inch master cylinder bore diameter for hydraulic brake pressure control
• Aluminum master cylinder construction
• Standard replacement grade for direct brake system service
• DOT 3 fluid type
• Part number M4081
• This part cross-references 10367561 for the same application

Detailed Description

Part number M4081 is a remanufactured brake master cylinder built for Cadillac vehicles equipped with front disc brakes. It is compatible with 2005-2009 Cadillac SRX, 2005-2008 Cadillac STS, and 2005-2007 Cadillac CTS, making it a direct-fit hydraulic brake service part for these applications. The aluminum body, 1-inch bore, and standard replacement design support proper brake pedal feel and system pressure delivery.

Because the reservoir, cap, push rod, brake booster, mounting hardware, gasket or seal, sensor, and brake pressure switch are not included, this master cylinder is intended for service where existing related components are reused or sourced separately as needed. MPA Electrical remanufactures brake master cylinders using OE-based testing protocols to verify performance before shipment.

What It Helps Address

• Low or inconsistent brake pedal response
• Internal hydraulic leakage in the master cylinder
• Brake fluid pressure loss in the brake system
• Pedal travel that feels excessive or uneven
• Brake performance decline on Cadillac SRX, STS, or CTS front disc brake setups

Installation Notes and Tips

Before installation, confirm the vehicle is equipped with front disc brakes and verify the master cylinder bore and mounting hole layout match the original unit. Bench bleeding is typically required after installation to remove trapped air from the hydraulic circuit. Inspect the brake booster, push rod, and fluid lines for wear or contamination before reassembly, and fill the system with DOT 3 brake fluid only.

Quality Assurance

MPA Electrical remanufactures this master cylinder using OE sample references and testing protocols that check the unit against OE specifications. That process helps ensure consistent braking performance right out of the box for Cadillac SRX, Cadillac STS, and Cadillac CTS applications.