Description
Coolant level sensor for Cummins ISX, M11, N14, ISM, L10, K19, and K38 engines. Automann 577.905550 replaces Cummins OEM 4383933 and crosses to 2872768, 2872769, 3612521, and 4903489. Three-pin connector with 1/4″-18 NPT mounting thread; mechanical float-switch design provides a reliable on/off signal to the dash to prevent overheating from low coolant.
Signs You Need a New Coolant Level Sensor
- Low-coolant warning light stays on with coolant at proper level
- No low-coolant warning when reservoir is verified low
- Intermittent low-coolant warning during normal operation
- Engine fault codes related to coolant level signal circuit
Specifications
| Manufacturer | Automann |
|---|---|
| Part Number | 577.905550 |
| Part Type | Coolant Level Sensor |
| Engine Compatibility | Cummins ISX, M11, N14, ISM, L10, K19, K38 |
| Pin Count | 3 |
| Thread Size | 1/4″-18 NPT |
| Overall Length | 3.55 in |
Cross References
This coolant level sensor replaces or is equivalent to the following part numbers:
- Cummins: 4383933, 2872768, 2872769, 3612521, 4903489
- PAI Industries: 050750
Applications
This coolant level sensor fits the following engines:
- Cummins ISX 15L (EPA04+ era)
- Cummins ISM 10.8L
- Cummins M11 / L10 (Celect / Celect Plus)
- Cummins N14 (Celect / Celect Plus)
- Cummins K19 / K38
Representative vehicles using these engines:
- Kenworth W900, T800, T660 with Cummins ISX/N14
- Peterbilt 379, 387, 389 with Cummins ISX/N14
- Freightliner Classic, Columbia, Coronado with Cummins ISX/N14
- International 9400i with Cummins N14/ISM
Verify your engine serial number and configuration before ordering to confirm fitment.
