MPA Electrical NM52309 Brake Master Cylinder

Brake Master Cylinder for Isuzu Pickup and Trooper

The MPA Electrical NM52309 brake master cylinder is a standard replacement for select Isuzu models with front disc brakes. Built with an aluminum body, integrated reservoir, and cap, it is engineered to restore hydraulic braking performance with consistent pedal response.

Fits 1984-1987 Isuzu Pickup, N/A. Fits 1984-1986 Isuzu Trooper, N/A. This part cross-references OE-style numbers such as 8941126250 and 8941135821 for the same application.

Key Features

• Brand: MPA Electrical
• Part number: NM52309
• Brake master cylinder for brake hydraulic service
• 0.875-inch bore diameter
• Aluminum master cylinder construction
• Reservoir and master cylinder cap included
• Standard replacement grade
• Uses DOT 3 brake fluid
• Two mounting holes with 0.346-inch mounting hole diameter
• New with front disc brakes application

Product Details

MPA Electrical NM52309 is built to OE specifications using sample-based engineering and testing protocols to help deliver consistent braking performance out of the box. The 0.875-inch bore supports hydraulic pressure generation for the brake system, while the aluminum housing helps keep the unit lightweight and corrosion resistant. The included reservoir and cap simplify replacement of the master cylinder assembly on Isuzu Pickup and Isuzu Trooper models listed for front disc brake applications.

For buyers searching for an Isuzu Pickup brake master cylinder or an Isuzu Trooper brake master cylinder, NM52309 provides a direct-fit replacement option for the specified years and brake configuration. The part number NM52309 is also useful when cross-checking OE-style interchange references during brake system repair.

What It Helps Address

• Low or inconsistent brake pedal feel
• Internal master cylinder seal wear
• Brake fluid bypass inside the hydraulic unit
• Loss of braking pressure at the pedal
• Brake system performance decline on front disc brake vehicles

Installation Notes and Tips

Before installation, confirm the vehicle is equipped with front disc brakes and verify bore size, mounting hole layout, and reservoir style against the removed 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 brake lines, fittings, and the booster interface during replacement to help prevent leaks and repeat repairs.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary processes and strict protocols. That validation process is used to help ensure the NM52309 meets the expected hydraulic performance for the listed Isuzu Pickup and Isuzu Trooper applications.