COOLANT LEVEL SENSOR
The PAI 50673 (050673) Coolant Level Sensor delivers reliable coolant level monitoring for heavy-duty diesel engines. Built to meet OEM specifications, it's designed to integrate easily into cooling system reservoirs, accurately detecting low coolant conditions. Supplied by Wofford Truck Parts, it features durable construction and dependable performance, making it a secure replacement in various Cummins and related engine platforms.
$164.80
Specifications
The PAI 50673 / 050673 Coolant Level Sensor (sold by Wofford Truck Parts) is an aftermarket replacement sensor engineered for detecting coolant levels in heavy-duty diesel engine reservoirs. It is made to match OEM form, fit, and function for compatibility and reliability. The sensor typically features a 4-pin connector, a 1/4-18 thread, and an overall length of about 3.93 inches.
Its internal switching or resistive circuitry signals the engine control system or warning lamp when coolant falls below defined thresholds, helping prevent engine overheating or damage. PAI tests this sensor to OEM tolerances and backs it with a 2-year warranty.
The 050673 is a direct replacement for Cummins part number 4903489, and cross-references such as 3612521, 4383932 (among others) are documented.
Because this sensor is used across multiple engine families (especially Cummins L10, M11, ISM, N14), it finds application in many heavy-duty truck platforms (Freightliner, Mack, Navistar, Peterbilt, etc.). Always confirm fit with your engine model, thread, and electrical interface before installing.
Compatibility
Freightliner Cascadia — 2008–present.
Freightliner Columbia / Century / Century Class — ~2000–2015.
Freightliner Coronado / Argosy — ~2003–2016.
Kenworth T680 — 2012–present.
Kenworth W900 / T800 / T600 / T2000 — ~1995–2015
Peterbilt 379 / 387 / 567 / 320 / 348 — ~1995–present
Volvo VN / VNL series — 2005–present
International / Navistar 9400 / 9200 / ProStar / 9900 — 1998–2016
Mack — mid-1990s–2015.
Sterling (vocational / US-market Freightliner-derived models) — mid-2000s
Dodge / Ram (heavy-duty chassis using Cummins B-series variants in late-1990s / early-2000s for some cross-refs) — ~1998–2007 (where applicable).
Alternative Part Numbers
3612521
4383932
4903489
4333-1673785C92
1MR4299
1673785
1673785C91
1673785C92
86714A1
86714A2