Holset 4042573H Turbo Actuator | Cummins ISX | New

Genuine new Holset VGT turbo actuator kit, part number 4042573H, for Cummins ISX engines. Holset is the original equipment manufacturer for this actuator. The actuator positions the variable geometry vanes and operates the exhaust brake. This actuator requires calibration after installation.

Key Features

• Genuine new OE Holset unit, not remanufactured
• Controls variable vane position and exhaust brake operation
• Clean base number is 4042573; H denotes new and HX remanufactured

Specifications

• Part number: 4042573H
• Base part number: 4042573
• Component type: VGT turbocharger actuator kit
• Condition: New
• Engine: Cummins ISX
• Calibration: required after installation
• Sold as: kit

Compatibility & Fitment

• Engine: Cummins ISX
• Equipment: Class 8 on-highway trucks powered by the ISX

Fitment gate — actuators are matched to the turbocharger, not the engine. The ISX used more than one turbocharger across its production run and emissions eras. Read the part number off the actuator you are removing, or confirm your turbocharger part number, before ordering.

Installation requirement — this actuator must be calibrated to the turbocharger after installation. Calibration requires Cummins INSITE, the Holset E-Tool, or a capable scan tool. The job cannot be completed without calibration, and an uncalibrated actuator will not control vane position correctly.

Diagnostic note — a failed actuator commonly presents as a non-functioning exhaust brake, along with turbocharger-related fault codes. The actuator can often be replaced without removing the turbocharger.

Conclusion

This is the genuine new Holset VGT actuator kit for Cummins ISX engines, part number 4042573H. Confirm your turbocharger part number before ordering, and plan on calibration as part of the installation.