Description
This is an aftermarket coolant-level (low-coolant) sensor for Detroit Diesel Series 60 12.7L and 14.0L engines, with the 2-pin rectangular connector and 9/16-18 male thread used by Freightliner Argosy, Cascadia, Columbia, and Century cabs from roughly 1999 to 2015. Direct replacement for Detroit Diesel 23522855, 23526907, and DDE23522855 — also catalogued as PAI 650648 and Dorman 904-7252.
Signs You Need a New Coolant Level Sensor
- Low-coolant warning lamp stays on with a full reservoir
- Lamp fails to illuminate when coolant is genuinely low
- Intermittent low-coolant alerts that come and go with vibration
- Engine derate triggered by low-coolant fault codes
- Visible damage, corrosion, or leakage at the sensor body
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 650648 (Detroit 23522855) |
| Part Type | Coolant Level (Low-Coolant) Sensor |
| Engine Compatibility | Detroit Diesel Series 60 (12.7L, 14.0L) |
| Connector | 2-Pin, Rectangular |
| Thread | 9/16-18 UNF-2A |
Cross References
This coolant level sensor replaces or is equivalent to the following part numbers:
- Detroit Diesel: 23522855, 23526907
- Freightliner / Detroit (DDE): DDE23522855, DDE23526907
- PAI Industries: 650648
- Dorman: 904-7252
- Automann: 577.23512
- Also known as: AM57723512, 57723512, S-22263, 25526907
Applications
This sensor fits the following engines:
- Detroit Diesel Series 60 12.7L (1999–2007)
- Detroit Diesel Series 60 14.0L (2003–2011)
Representative vehicles using these engines (with Freightliner cooling-system architecture):
- Freightliner Century, Columbia, Classic, FLD, Argosy (1999–2011)
- Freightliner Cascadia (2008–2015, Series 60)
- Freightliner Coronado (2003–2011)
- Western Star 4900, 5900 (with Series 60)
Verify your engine serial number, cooling-system part number, and connector configuration before ordering — the DD13/DD15/DD16 cab uses a different coolant-level sensor.
