I have a 2016 F25 super duty diesel. The part fit properly and fixed my problem and the check engine light resolved on its own after about 100 miles. However, the product did not come in the Ford wrapper package as I anticipated. It did appear to be identical to the one I removed. After removing the original heater unit I recommend taking a picture before this assembly. The job took me three hours; next time would take about one hour.
Ford factory parts are always the way to go!!! If purchased from a Ford dealer, they have a 2 year unlimited mileage warranty, backed by any dealer in the country. "That's all I got to say about that."
Did the replacement of the DEF heater, hardest part was getting the clearance to remove the DEF reservoir, actual replacement of DEF heater is foolproof as there's an arrow to match up to a line on the reservoir to ensure sender unit/DEF pump faces the correct position. All required pieces came with the unit.