Buy wp20001 - Genuine Cummins Turbocharger Actuator - 1 - wisentpartscenter.com

Description

Cummins 3788932 Turbocharger Actuator is used on select Cummins ISB 6.7L variable-geometry turbocharger applications, including RAM 6.7L Cummins and other trucks where this exact actuator number or a verified interchange is specified. The actuator controls turbo vane position for boost regulation, exhaust brake operation, and ECM-commanded turbo response. Because 3788932 is electronically controlled and application-sensitive, correct part number matching is important. Fitment should be verified by VIN, engine serial number, turbocharger model, and original actuator number before ordering. This actuator may cross-reference with other Cummins/Holset service numbers, but interchange should be confirmed before installation.

Purpose of the Part

The 3788932 turbocharger actuator positions the VGT turbocharger vanes to control boost pressure, exhaust flow, low-RPM response, and exhaust brake function. If the actuator fails or cannot complete calibration, the engine may experience low boost, overboost, reduced power, exhaust brake loss, or derate conditions.

Issue Symptoms / When to Replace

Common signs of a failing 3788932 turbo actuator may include loss of exhaust brake operation, low boost, overboost, turbo lag, unstable boost control, reduced engine power, limp mode, or check engine light. Related fault codes may include P00AF, P003A, U010C, P226C, P2262, or P0299. These codes should be diagnosed before replacement because wiring, stuck turbo vanes, boost leaks, or calibration issues can cause similar symptoms.

Brand Information

Cummins is a global diesel engine and powertrain manufacturer and the original engine manufacturer for the ISB 6.7L platform used in RAM and other medium-duty truck applications. Cummins components are built to match the engine’s electronic control strategy, service requirements, and operating conditions. For a turbo actuator, Cummins is the preferred OEM source because correct calibration, ECM communication, and actuator position control are critical to boost performance, exhaust brake operation, and emissions-system reliability.

Installation Notes

Install 3788932 only on a compatible turbocharger with free vane movement. Calibration or relearn is required with compatible diagnostic software after installation. Do not force the actuator gear or linkage. Refer to the OEM service manual for torque specifications, mounting procedure, calibration steps, and final verification.

How to Identify an OEM Part

An OEM Cummins/Holset turbo actuator should have HOLSET branding cast into the actuator housing, not only painted or printed on the surface. Aftermarket units often do not have the HOLSET casting mark, and some may have markings painted on instead of molded/cast into the metal. Verify the casting mark, actuator label, part number, connector, and original packaging before installation.

Technical Documents

Why Buy 3788932 from Wisent Parts

  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

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Warranty & Return Information
Warranty Information

Wisent Parts offers a 180-day 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.