Dorman 924-5516XD Engine Coolant Level Sensor

Dorman 924-5516XD Coolant Level Sensor

Dorman 924-5516XD is an engine coolant level sensor built for Mack truck cooling systems that need more consistent level detection. It uses a magnetic float with a wider sweep area and a rigid stainless steel shaft to improve signal accuracy and resist coolant intrusion.

For Mack refuse trucks and other short-haul applications, this OE FIX design helps reduce false coolant warnings that can trigger limp mode and unnecessary downtime.

Key Features

• Engine coolant level sensor for Mack truck applications
• Magnetic float design with a larger sweep area for more accurate level sensing
• Rigid stainless steel shaft with epoxy sealing to help block coolant ingress
• 2-wire, straight female connector design
• M26 x 2 threaded mounting with black metal construction
• Separate harness attached to the connector for simpler installation

Detailed Description

This Dorman OE FIX coolant level sensor addresses a known weakness in the original factory design used on certain Mack trucks. The OE-style sensor relies on a magnetic float and plastic shaft that can be affected by vibration, especially in stop-and-go refuse truck service. Dorman 924-5516XD replaces that setup with a more durable metal-bodied sensor, a stainless steel shaft, and epoxy protection to improve resistance to coolant contamination and repeated jostling. It is a practical replacement for Mack coolant level sensor service where accurate fluid monitoring is critical.

This part cross-references Mack applications such as 577.62517 and 853719 for the same application.

What It Helps Address

• False low-coolant readings
• Fault codes caused by sensor vibration or float travel limits
• Limp mode events tied to inaccurate coolant level data
• Downtime from repeated coolant sensor failures
• Coolant ingress into the sensor assembly

Installation Notes and Tips

Use the threaded M26 x 2 mounting interface and the attached harness to simplify replacement. The separate harness helps eliminate the need to index the OEM sensor during installation. Verify connector style, thread size, and physical length before service, and confirm the Mack truck cooling system uses the correct coolant level sensor location.

Quality Assurance

Dorman OE FIX parts are engineered to address known failure points in original equipment designs while maintaining serviceable fit and function for the intended application.