MPA Electrical NM3090 Brake Master Cylinder

Brake Master Cylinder for GM Front Disc Brake Applications

The MPA Electrical NM3090 brake master cylinder is a standard replacement for select GM vehicles with front disc brakes. Built with an aluminum body, integrated reservoir, and a 1-inch bore, it is engineered to restore consistent hydraulic brake pressure for everyday driving.

Compatible with 2000-2005 Chevrolet Impala, 2003-2005 Chevrolet Monte Carlo, 2003-2005 Buick Century, 2003-2004 Buick Regal, and 2003 Pontiac Grand Prix, this NM3090 master cylinder is a direct-fit service part for common brake hydraulic repairs.

Key Features

• Standard replacement brake master cylinder
• 1-inch master cylinder bore diameter
• Aluminum construction for OE-style service replacement
• Reservoir included; master cylinder cap included
• Uses DOT 3 brake fluid
• Two mounting holes with 0.425-inch mounting hole diameter
• New condition

Product Details

MPA Electrical’s New with front disc brakes line focuses on brake hydraulic components for vehicles that need a reliable OE-style replacement. The NM3090 is tested against OE specifications using sample-based validation and controlled inspection processes to help ensure proper brake pedal response and hydraulic performance after installation. This part cross-references GM applications such as 18040251 and 19209247 for the same application.

Use the NM3090 when servicing a Chevrolet Impala brake master cylinder, a Chevrolet Monte Carlo brake master cylinder, or a Buick Century brake master cylinder on vehicles equipped with front disc brakes. It is also a direct replacement choice for Buick Regal and Pontiac Grand Prix brake hydraulic repairs in the listed model years.

Common Problems This Part Can Address

• Low or inconsistent brake pedal feel
• Internal master cylinder leakage
• Brake fluid loss at the hydraulic unit
• Reduced braking response from worn seals or bore wear
• Brake warning concerns tied to master cylinder performance

Installation Notes and Tips

Before installation, verify vehicle fitment by year, make, model, and front disc brake configuration. Bench bleed the master cylinder before connecting brake lines, and use clean DOT 3 brake fluid only. Inspect the brake booster, lines, and fittings for wear or contamination so the new master cylinder can deliver proper hydraulic pressure.

Quality Assurance

Each NM3090 brake master cylinder is checked against OE specifications through MPA Electrical’s testing and inspection process to support consistent performance out of the box. The aluminum housing, included reservoir, and standard replacement design make it a practical service part for restoring brake system operation on the listed GM vehicles.