Coolant Level Sensor – 577.46605 or 0662384002

The rTech Black Label RT6605 Coolant Level Sensor is a heavy-duty replacement designed for compatible commercial truck coolant reservoir systems.

The sensor works with the vehicle’s coolant monitoring circuit to provide coolant-level status to the vehicle.

A properly functioning coolant level sensor supports early identification of a low-coolant condition and helps maintain reliable cooling-system monitoring in demanding fleet service.

Built for uptime. Built for serious trucks.

Features & Benefits

• 2-pin coolant level sensor
• Designed for compatible coolant reservoir systems
• Supports vehicle coolant-level monitoring 
• Helps restore proper coolant-level sensing when replacing a failed sensor
• Compact reservoir-mounted design
• Durable construction for commercial vehicle environments
• Straightforward replacement
• Fleet-approved Black Label quality
  

rTech Product Specifications

• rTech Part Number: RT6605
• Product Type: Coolant Level Sensor
• Electrical Connection: 2-Pin
• Operating Voltage: 5V
• Length to Mounting Face: 2.313"
• Outside Diameter: 1.89"
• Installation: Reservoir-Mounted
• Series: rTech Black Label
  

Vehicle Applications

Designed as an aftermarket replacement for compatible Freightliner coolant reservoir systems.

Current application data for the 924-5205 / 06-62384-002 family includes Freightliner Cascadia, with Dorman listing 2008–2020 fitment for its corresponding sensor.

Coolant reservoir and sensor configurations can vary by chassis, engine, model year, and reservoir assembly. Verify fitment by VIN or existing sensor number before ordering.

Direct Cross References

• rTech Black Label: RT6605
• Automann: 577.46605
• Freightliner: 06-62384-002
• Freightliner: 0662384002
• Dorman: 924-5205
• Dorman: 924-5205CD
• World American: WA912-18-7873
• Reference: 662384002 
  

These relationships are independently catalogued across current Dorman/interchange sources. 

Cross-reference numbers and manufacturer names are provided for identification and fitment purposes only. All trademarks are the property of their respective owners. rTech Black Label products are independent aftermarket replacement parts and are not manufactured, sponsored, endorsed, or approved by the referenced manufacturers. Always verify fitment before installation.

Why Coolant Level Monitoring Matters

A coolant level sensor provides information to the vehicle’s monitoring system about coolant level within the reservoir.

Proper coolant-level monitoring supports:

• Early identification of low-coolant conditions
• Driver awareness
• Cooling-system monitoring
• Preventative fleet maintenance
• Reduced risk of continued operation with inadequate coolant

The sensor does not replace routine cooling-system inspections, but it is an important part of the vehicle’s monitoring system.