AirDog Water In Fuel Sensor Kit. Integrate the OEM Water In Fuel (WIF) sensor and warning light in your 2007.5-2023 Dodge/Ram Cummins Diesel with your AirDog® system. This plug-and-play kit utilizes a wiring harness that connects to your OE WIF plug and a sensor that threads into the bottom of your AirDog® water separator to retain your OE Water In Fuel light. This kit works for any and all AirDog® products when used in conjunction with the AirDog® Water Separator (WS100), which is also conveniently supplied in the kit.