Buy 3925378, 3930318 - Genuine Cummins Throttle Position Sensor - wisentpartscenter.com

Description

Genuine Cummins 3925378 Throttle Position Sensor monitors throttle-lever position and converts that movement into an electrical signal used by the vehicle control system. On the mechanical 5.9L Cummins applications commonly associated with this sensor, fuel delivery is still controlled mechanically at the injection pump; the sensor provides throttle-position information needed by systems such as the automatic transmission rather than directly controlling engine fueling.

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

Purpose of the Part

The 3925378 tells the vehicle controls how far the driver has moved the throttle. On mechanical-injection applications such as the 12-valve 5.9L Cummins, that signal is especially important to the automatic transmission because shift timing and transmission behavior depend partly on throttle position.

Issue Symptoms / When to Replace

A worn throttle-position sensor can cause poorly timed automatic-transmission shifts, intermittent throttle-position readings, or a signal that jumps instead of increasing smoothly as the throttle is opened. Because connector damage, wiring resistance, poor adjustment, or linkage problems can create similar symptoms, the signal should be tested before replacing the sensor.

Brand Information

Cummins was founded in Columbus, Indiana in 1919 and has produced diesel engines, fuel-system components, controls, and service parts for more than a century. Cummins still catalogs 3925378 as a genuine position sensor for its B-Series engine family, including the 5.9L platform widely used in Dodge Ram and industrial applications.

Installation Notes

After installation, verify sensor adjustment and confirm that output voltage rises smoothly through the throttle range; service information for the 12-valve application specifies approximately 0.8–1.2 volts at idle/key-on.

How to Identify an OEM Part

A genuine 3925378 should carry the Cummins part number directly on the sensor or its factory Cummins identification.

Why Buy 3925378 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.

Shop with confidence

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.