This clutch master cylinder assembly is designed for Isuzu NPR, Isuzu NPR-HD, Isuzu NQR, and Isuzu NRR trucks manufactured between 1995 and 2007, equipped with the 4HK1 5.2L diesel engine.

The clutch master cylinder is a key component of the hydraulic clutch system. When the clutch pedal is pressed, the master cylinder converts pedal force into hydraulic pressure, which activates the slave cylinder and disengages the clutch.

Over time, internal seals can wear or leak, leading to:

• Soft or spongy clutch pedal

• Difficulty shifting gears

• Clutch pedal sticking to the floor

• Visible hydraulic fluid leaks

• Incomplete clutch disengagement

Replacing a worn or leaking clutch master cylinder restores proper hydraulic pressure, smooth clutch operation, and consistent gear engagement. Manufactured to OEM specifications for correct bore size, mounting alignment, and long-term durability.

Key Features

• OEM-style clutch master cylinder assembly

• Designed for 4HK1 5.2L diesel engine

• Fits Isuzu NPR, NPR-HD, NQR, and NRR (1995–2007)

• Restores proper hydraulic clutch pressure

• Direct-fit replacement with factory-style mounting

• Durable seals for leak prevention

Vehicle Compatibility (1995–2007)

Fits Isuzu Medium-Duty Trucks:

• Isuzu NPR

• Isuzu NPR-HD

• Isuzu NQR

• Isuzu NRR

Engine:

• 4HK1 5.2L Diesel

Condition: New OEM replacement
Position: Clutch hydraulic master cylinder assembly

Common Signs You Need a New Clutch Master Cylinder

• Spongy or soft clutch pedal

• Gear grinding during shifting

• Fluid leaking near clutch pedal

• Clutch not fully disengaging

• Difficulty engaging reverse or first gear