Buy 4034122RX - Genuine Cummins Turbocharger VGT Actuator - wisentpartscenter.com

Description

The Genuine Cummins Holset VGT Turbocharger Actuator 4034122 is for Cummins ISC 8.3L and ISL 8.9L diesel engines. This electronic actuator controls the turbocharger's variable geometry mechanism to regulate boost pressure, supporting engine performance, acceleration, and efficient operation.

Fitment / Applications

  • Engine Manufacturer: Cummins
  • Engine: ISC 8.3L Diesel
  • Engine: ISL 8.9L Diesel
  • Emissions Configuration: EPA07
  • Electrical System: 12V DC
  • Turbocharger: Holset HE351VE VGT applications
  • Actuator Type: Electronic Variable Geometry Turbocharger Actuator

What's Included

  • 1 × Genuine Cummins Holset Electronic VGT Actuator

Note: Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

The VGT actuator adjusts the turbocharger's internal mechanism to control boost pressure based on engine demand. It helps maintain responsive acceleration, consistent engine power, and efficient turbocharger operation under different driving conditions.

Issue Symptoms / When to Replace

Possible signs of turbocharger actuator problems may include:

  • Reduced engine power or sluggish acceleration
  • Low or inconsistent turbocharger boost pressure
  • Check Engine light or VGT actuator-related fault codes
  • Intermittent loss of power under load
  • Engine entering reduced-power mode

These symptoms may also result from turbocharger, wiring, or other engine control issues. Proper diagnosis is recommended before replacing the actuator.

Brand Information

Holset, part of Cummins Turbo Technologies, introduced the world's first sliding-wall variable geometry turbocharger in 1998. This technology allows the turbocharger to adjust exhaust gas flow for improved boost control. Holset electronic VGT actuators provide the precise positioning needed to operate these variable geometry systems in Cummins diesel engines.

Installation Notes
  • Turbocharger Mechanism: Check for sticking or binding in the VGT mechanism before installing the replacement actuator.
  • Actuator Calibration: Perform the required actuator installation and calibration procedure using Cummins INSITE or compatible Holset diagnostic equipment.

How to Identify an OEM Part

Look for the HOLSET name cast directly into the actuator's metal housing, along with the manufacturer identification markings and Data Matrix code, as shown in the reference photo.

Why Buy 4034122 From Wisent Parts Center?

  • 1 Year
    Warranty

  • Genuine Parts

    Authentic OEM parts

  • 30-Day Returns

    Conditions apply

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Warranty & Return Information
Warranty Information

Wisent Parts offers a 1-year warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.