It is a known problem that the Jeep Wrangler heater core prematurely clogs and subsequently fails causing less heat from the driver's side defroster vents. During this recent cold snap in Michigan the defroster struggled to adequately clear the windshield of frost and snow and I felt this to be a safety issue. I approached my Jeep dealer and they said "yeah the heater cores go out early" nothing we can do, it will be $1500-2000 to repair as it involves removing the entire dash. I have never had a heater core clog with less than 50,000 miles, this is clearly a manufacturers defect and in cold weather climates cold pose a significant safety hazard. A brief search of the internet leads to a pending class action website further giving proof to the widespread knowledge of this problem. The website is: Https://www.carcomplaints.com/news/2017/Jeep-Wrangler-heater-core-replacement-lawsuit-challenged.shtml I would ask NHTSA to look into this further as not having adequate defrosting capabilities could hinder driver vision out of the windshield and side front windows.

- Grand Rapids, MI, USA