Isuzu 6646906 Fuel Injector Assembly

The 6646906 fuel injector is a direct replacement component designed for Isuzu 4JB1 2.8L diesel engines. It restores correct fuel delivery and spray pattern, providing easier starting, stable idle, full power output, and lower fuel consumption. The injector features a 5-hole nozzle design calibrated for the 4JB1 combustion chamber. This part serves as a critical fuel system component for Bobcat skid steer loaders (models 843, 853, 1213) and Mustang skid steer loaders (models 960, 2060). It meets or exceeds OEM specifications for fit, function, and durability in heavy-duty construction machinery applications. The injector assembly includes the nozzle holder and nozzle tip as a matched set. Replacement of the complete injector set is recommended to maintain balanced engine performance.