Cummins 3971994 Engine Speed Sensor Assembly (Magnetic/CKP)
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| Part Number | 3971994 |
| Sensor Type | Magnetic Inductive Speed Sensor (Variable Reluctance / Magnetic Pickup) |
| Signal Output | AC Sinusoidal Voltage |
| Line Number | 2 Wire |
| Installation Thread | M18 × 1.5 |
| Total Length | 250 mm |
| Voltage | 5V/12V Power Supply (ECM Power Supply) |
| Coil Resistance | 800-1200 Ω (Typical Value) |
| Operating Temperature | -40°C to +130°C |
| Protection Rating | IP67 |
| Connector Type | Packard Weatherpack 2 Pin |
| Applicable Emission Standard | Tier 2 / Euro II |
| Material | Stainless Steel Probe + High-Temperature Engineering Plastic Shell |
| Weight | Approx. 0.15 kg |
Manufacturer No.
3971994C3971994HM397199421YB054
OEM Part No.
39719943078155
Engine Part No.
4BT 3.9L6BT 5.9L6CT 8.3LC8.3L8.96LTAA8.9-G2ISLEISBEB Series Tier 2
Interchange No.
C3971994HM397199421YB0543078155
Fitment Vehicles
Dongfeng Cummins 4BT/6BT/6CT EngineCummins Generator SetConstruction Machinery Excavator LoaderCommercial Vehicle Truck Truck Truck BusMarine Power EquipmentKubota Agricultural Machinery
Engine System - Industrial Encyclopedia
Cummins OEM 3971994 speed sensor (magnetic), fit for 4BT3.9L, 6BT5.9L, 6CT, C8.3, L8.9 and other B/C/L series diesel engines. M18×1.5 thread, 250mm overall length, dual-line plug, output AC sine wave signal to ECM for precise injection timing control. Widely used in Dongfeng Cummins construction machinery, generator sets, commercial vehicles and marine engines, interchange numbers include C3971994, 3078155, 21YB054, meets Tier 2 emission standards, resistant to high temperature and vibration, ready to install.