Product Description
Cummins 3920363 — Genuine Coolant Temperature Sensor (5.9L B-Series)
MPN: 3920363 | Also Known As: engine coolant temp sensor, ECT, gauge sender | Connector Style: single-wire
Restore accurate temperature readings on your first/second-gen 5.9. The genuine Cummins 3920363 coolant temperature sensor is the OE single-wire sender used on many 1992–1997 Ram 2500/3500 5.9L 12-valve applications and other B-Series engines. Built to Cummins’ calibration and sealing specs for reliable data and long service life.
Features & Benefits
- OE signal accuracy so the PCM/instrument cluster reads true coolant temperature.
- Direct-fit single-wire sender for common 5.9L 12V builds—no wiring hacks.
- Durable sensing element and body for heat, vibration, and coolant exposure.
- Fixes common symptoms like inoperative/erratic temp gauge or nuisance overheat warnings (after wiring/ground checks).
- Genuine Cummins part number for traceability.
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1992–1993 | 5.9L 12V (VE) | Ram 2500/3500 |
| 1994–1997 | 5.9L 12V (P7100) | Ram 2500/3500 |
Industrial/Off-Highway: Cummins catalogs 3920363 as a Temperature Sensor used primarily on 5.9L B-Series engines (Euro 2 family). Verify by ESN for equipment engines.
Compatibility Notes:
- Many reputable catalogs specify 1992–1997 Ram coverage for this single-wire sender. Some retailers list 1994–1998—if you have a 1998, confirm by VIN/ESN and connector style before ordering.
- Location is an engine coolant passage (cylinder head/thermostat housing area) depending on build.
Specifications
- Type: Coolant temperature sensor (single-wire sender)
- OE Part Number: 3920363
- Electrical: 1-pin sender to gauge/PCM (verify harness on your vehicle)
- Mounting: Threads into coolant passage (seal included on many kits)
- Quantity Required: 1 per engine
Often Paired With
- Connector pigtail/repair lead (if your single-wire terminal is brittle or corroded)
- Thermostat (OE): Cummins 5292744 190° or 5292742 180° (’98.5–’07 windows; for earlier trucks use correct-year units)
- Coolant & sealing washer/O-ring as applicable to your build
What’s In The Box
- (1) Genuine Cummins Coolant Temperature Sensor (3920363)
- Seal/washer may be included by supplier—check contents.
Installation Tips
- Work on a cool engine; lower coolant level below the sensor.
- Clean the port; install the new sensor and tighten to spec. Do not overtighten.
- Inspect the single-wire connector and ground path; repair if green/corroded.
- Refill/bleed coolant and verify gauge and scan-tool readings.
FAQ
WILL THIS FIT MY 5.9L 12-VALVE RAM?
It’s the OE single-wire sender for many 1992–1997 trucks. Some sellers include 1998; if you have a 1998, check your VIN/ESN and connector style to confirm.
IS THIS THE GAUGE SENDER OR THE ECM SENSOR?
It’s a single-wire coolant temperature sender used for gauge/PCM input on many 12-valve applications. Always match to your connector style.
DOES IT COME WITH A SEAL?
Many OE packages include the needed seal/washer. If not, reuse only if in perfect condition or replace with new.
WHERE IS IT LOCATED?
Threaded into an engine coolant passage—commonly the cylinder head/thermostat housing area, depending on build.
IS THIS A GENUINE CUMMINS PART?
Yes—OE Cummins 3920363.
