The Alltrux ATX22103 Coolant Level Sensor replaces OEM 21399626 and is designed as a service replacement for heavy-duty truck engine cooling systems. This sensor monitors coolant level within the reservoir and provides a signal to the vehicle’s electronic control system to help prevent low coolant operation, supporting reliable engine protection and consistent performance in fleet and vocational environments.

Coolant level sensors play a critical role in engine protection by detecting low coolant conditions that can lead to overheating and severe engine damage. As original sensors wear electrically, become contaminated, or fail due to vibration and heat exposure, inaccurate readings or warning system faults can occur. Replacing worn coolant level sensors helps restore accurate coolant monitoring, improve engine safety, and reduce unplanned downtime.

KEY FEATURES
• Designed for heavy-duty truck engine coolant level monitoring applications
• Helps detect low coolant conditions to protect against overheating and engine damage
• Supports reliable warning system operation and engine protection
• Durable construction suited for fleet, vocational, and on-highway use
• Brand: Volvo
• Verify compatibility and application requirements before ordering

TECHNICAL SPECIFICATIONS
Alltrux Part Number: ATX22103
OEM Reference: 21399626
Product Type: Coolant Level Sensor
Brand: Volvo
System Application: Heavy-Duty Truck Engine Cooling System

CROSS REFERENCES
21399626, ATXVOL44PTR

Note: Confirm OEM reference and application details before ordering to ensure proper fit and cooling system compatibility.