MPA Electrical NM4022 Brake Master Cylinder

Brake Master Cylinder for Saturn L-Series

Restore consistent brake pedal response with this new brake master cylinder from MPA Electrical. Built as a standard replacement for Saturn L-Series vehicles with front disc brakes, part number NM4022 is engineered to match OE specifications for dependable hydraulic performance.

Compatible with 2000-2005 Saturn LS, LS1, LS2, LW1, LW2, L100, L200, L300, LW200, and LW300 applications with front disc brakes, this aluminum master cylinder includes a plastic reservoir, reservoir cap, gasket or seal, and a 1-inch bore diameter.

Key Features

• Brand: MPA Electrical
• Part number: NM4022
• Standard replacement brake master cylinder
• Aluminum master cylinder body with plastic reservoir
• 1-inch master cylinder bore diameter
• Reservoir, cap, and gasket or seal included
• Uses DOT 3 brake fluid
• 2 mounting holes with 0.36-inch mounting hole diameter
• No brake booster, push rod, sensor, or pressure switch included
• New condition

Product Details

MPA Electrical’s New with front disc brakes product line focuses on direct-fit hydraulic brake components for Saturn L-Series platforms. This brake master cylinder is tested against OE specifications using sample-based validation and controlled inspection processes to help deliver consistent braking performance right out of the box. If you are replacing a worn or leaking master cylinder on a Saturn L300, L200, LW300, or related model, NM4022 provides the core hydraulic control needed for proper brake system operation.

This part cross-references OE numbers 21018891 and 22683095 for the same application.

What It Helps Fix

• Low or inconsistent brake pedal feel
• External brake fluid leaks at the master cylinder
• Internal hydraulic bypass causing pedal fade
• Brake warning symptoms tied to master cylinder wear
• Loss of braking performance on Saturn LS, LW, and L-Series vehicles

Installation Notes

Before installation, confirm the vehicle is equipped with front disc brakes and verify the mounting pattern, bore size, and fluid type. Bench bleeding the master cylinder before final installation helps remove trapped air and supports proper pedal feel after the system is reassembled. Use DOT 3 brake fluid only, and transfer any required external components not included with the unit.

Quality Assurance

MPA Electrical tests each unit against OE specifications using proprietary processes and strict inspection protocols to help ensure consistent hydraulic performance. This part is supplied new and built as a standard replacement for the listed Saturn applications.