MPA Electrical NM1858 Brake Master Cylinder

Brake Master Cylinder for Front Disc Brake Applications

The MPA Electrical NM1858 brake master cylinder is a standard replacement hydraulic component for select Ford, Lincoln, and Mercury vehicles with front disc brakes. Built with an aluminum body, integrated reservoir, and DOT 3 fluid compatibility, it is engineered to restore consistent brake pedal response and hydraulic pressure.

Compatible With 1972-1989 Ford, Lincoln, and Mercury front disc brake applications, including Lincoln Town Car, Mercury Grand Marquis, and Ford LTD models. The NM1858 is a direct-fit brake master cylinder for vehicles that need a replacement unit matched to OE-style specifications.

Key Features

• Standard replacement brake master cylinder
• 1-inch master cylinder bore diameter
• Aluminum master cylinder construction
• Reservoir included; master cylinder cap included
• Uses DOT 3 brake fluid
• Two mounting holes with 0.404-inch mounting hole diameter
• No brake booster, push rod, dust boot, gasket, seal, sensor, or mounting hardware included

Product Details

MPA Electrical NM1858 is part of the New with front disc brakes product line, which identifies the brake configuration this master cylinder is built around. MPA Electrical tests each unit against OE specifications using controlled processes and an OE sample library to help ensure consistent hydraulic performance out of the box. This brake master cylinder cross-references 2622521 and D9AZ2140A for the same application.

Fits 1981-1989 Lincoln Town Car, N/A; Fits 1987 Ford LTD Crown Victoria, N/A; Fits 1987 Mercury Colony Park, N/A; Fits 1979-1987 Mercury Grand Marquis, N/A; Fits 1985-1986 Ford LTD, N/A; Fits 1979-1982 Ford LTD, N/A; Fits 1980-1983 Lincoln Mark VI, N/A; Fits 1979-1982 Mercury Marquis, N/A; Fits 1980 Lincoln Continental, N/A; Fits 1972 Ford Thunderbird, N/A; Fits 1972 Mercury Montego, N/A.

Common Issues This Part Can Address

• Low or inconsistent brake pedal feel
• Internal hydraulic leakage in the master cylinder
• Brake fluid loss at the master cylinder assembly
• Reduced braking performance from worn hydraulic seals
• Brake system service needs on front disc brake vehicles

Installation Notes and Tips

Before installation, verify bore size, mounting hole spacing, and brake system configuration against the original unit. Bench bleed the master cylinder before connecting brake lines, then fill with DOT 3 brake fluid and bleed the system thoroughly to remove trapped air. Inspect the booster, lines, and wheel cylinders or calipers for leaks or wear before returning the vehicle to service.

Quality Assurance

MPA Electrical manufactures this master cylinder as a new standard replacement part and tests it to OE-based specifications for consistent braking performance. The aluminum construction and application-specific design support reliable hydraulic operation for the listed Ford, Lincoln, and Mercury fitments.