Product Description
Keep your first and second-gen Dodge running cool and honest with the CUMMINS 3920363 OEM COOLANT TEMPERATURE SENSOR. This genuine single-wire sender feeds accurate coolant temp data to the gauge/PCM on many 1992–1997 5.9L 12-valve Cummins trucks, helping prevent overheating, false warnings, and poor drivability caused by a lazy or failed sensor.
Built to Cummins’ OE calibration and sealing standards, the 3920363 coolant temperature sensor threads directly into the engine coolant passage and plugs into the factory harness — no splices or guesswork. If your 12-valve’s temperature gauge is dead, erratic, or lying to you, this is the real Cummins fix, not a bargain-bin copy.
Key Features & Benefits
- Genuine Cummins 3920363 coolant temperature sensor – not a generic replacement.
- Restores accurate coolant temperature readings to the gauge/PCM.
- Single-wire sender designed specifically for 5.9L 12-valve Cummins applications.
- Direct-fit OE threads and connector for fast install with no wiring mods.
- Built to handle diesel heat, vibration, and long-term coolant exposure.
Fitment
This coolant temperature sensor is commonly used on the following applications:
- 1992–1993 Dodge Ram 2500/3500 – 5.9L 12V Cummins (VE pump)
- 1994–1997 Dodge Ram 2500/3500 – 5.9L 12V Cummins (P7100 pump)
Engine Family: 5.9L B-Series 12-valve Cummins (automotive and select industrial Euro 2 B engines).
Connector: Single-wire sender (1-pin).
Location: Threaded into an engine coolant passage (commonly the cylinder head or thermostat housing area).
Note: Some catalogs show 1994–1998 coverage. For 1998 trucks, always confirm by VIN/engine serial number (ESN) and connector style before ordering.
Common Symptoms of a Bad Coolant Temp Sensor
- Inoperative, stuck, or erratic coolant temperature gauge.
- Random overheat warnings when the engine is not overheating.
- Hard starts, poor fuel economy, or rich/lean running when the PCM sees bad temp data.
- Check engine light or drivability complaints after wiring and grounds check good.
Cross-Reference & Related Cummins Sensors
Use these OE Cummins part numbers and related sensors to complete your cooling and engine sensor service. All links below go to genuine parts on CPP Diesel:
- Cross-reference number (gauge sender): Mopar 4720314 (ID only, not linked).
- 1998 12-valve coolant temp sensor: CUMMINS 3920364 OEM COOLANT TEMPERATURE SENSOR – 5.9L 12-VALVE (1998)
- Common-rail ISB coolant temp sensor: CUMMINS 4897224 OEM COOLANT TEMPERATURE SENSOR – ISB 5.9L (2003–2004)
- Matching intake air temp sensor for 12-valve: CUMMINS 3918461 OEM INTAKE AIR TEMPERATURE (IAT) SENSOR – 5.9L 12V (1991.5–1997)
- Genuine Cummins expansion plug for B-series turbo drain: CUMMINS 3920706 OEM EXPANSION PLUG (TURBO DRAIN) – 5.9L/6.7L
- Genuine Cummins front crankshaft seal kit: CUMMINS 3804899 OEM FRONT CRANKSHAFT SEAL – 5.9L/6.7L
Cross-reference numbers are provided for identification only. Always confirm fitment by VIN/ESN and connector style.
Installation Notes
- Work on a cool engine and lower coolant level below the sensor if necessary.
- Unplug the single-wire connector and carefully remove the old sensor.
- Clean the sealing surface; install the new sensor and torque to OEM spec.
- Inspect the harness and ground path; repair corroded or brittle wiring.
- Refill/bleed coolant, then verify gauge and scan-tool readings after installation.
Specifications for cummins 3920363
| Specification | Detail |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 3920363 |
| Sensor Type | Coolant temperature sensor (single-wire sender) |
| Engine Compatibility | 5.9L 12-valve Cummins B-Series; commonly used on 1992–1997 Ram 2500/3500 5.9L 12V. |
| Fuel Type | Diesel |
| Connector | Single-wire (1-pin) OE-style terminal |
| GTIN | Not specified by Cummins (no GTIN published in available data) |
| UPC | Not specified by Cummins (no UPC published in available data) |
| Shipping Weight | Approx. 1.0 lb |
| Shipping Dimensions (L × W × H) | Approx. 3 in × 3 in × 3 in (boxed) |
| Shipping Method | Ships via standard ground/small parcel from CPP Diesel |
| Cross Reference | Mopar 4720314 (gauge sender); may replace 3916021/3920364 in some non-automotive B-series applications – verify by ESN. |
| E-Codes / Emissions | OE emissions-calibrated temperature sender for B-series Cummins (no aftermarket tuning required). |
| Prop 65 Warning | Yes – This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. |
FAQ
WILL THIS CUMMINS 3920363 SENSOR FIT MY 5.9L 12-VALVE RAM?
This is the OE single-wire coolant temperature sender used on many 1992–1997 Dodge Ram 2500/3500 trucks with the 5.9L 12-valve Cummins. Some catalogs list 1994–1998 coverage. If you own a 1998 truck or have a swapped engine, always confirm by VIN/ESN and connector style before ordering.
IS THIS THE GAUGE SENDER OR THE ECM COOLANT SENSOR?
Cummins 3920363 is a single-wire coolant temperature sender that provides temperature information to the gauge/PCM on many 12-valve applications. It is not the later-style two-wire ECT sensor used on common-rail trucks. Always match the number of wires and connector style on your engine.
WHAT SYMPTOMS POINT TO A BAD COOLANT TEMPERATURE SENSOR?
Typical symptoms include a dead or erratic temperature gauge, false overheat warnings, poor fuel economy, and drivability issues when the PCM is seeing incorrect coolant temp data. Always inspect wiring, grounds, and coolant level/flow before condemning the sensor.
DO I NEED TO DRAIN THE COOLANT TO CHANGE THIS SENSOR?
You usually do not need to completely drain the system, but you should lower the coolant level below the sensor and work on a cool engine. Have a catch pan ready, swap the sensor quickly, then top off and bleed the system after installation.
WHAT OTHER CUMMINS PARTS SHOULD I CONSIDER WHILE SERVICING MY 12-VALVE?
Many owners pair this sender with other genuine Cummins components when refreshing older 5.9L engines — such as the 3918461 intake air temperature sensor , 3920706 turbo drain expansion plug , and 3804899 front crankshaft seal . CPP Diesel stocks a full line of genuine Cummins parts so you can keep your 12-valve reliable for the long haul.
