Study the datasheets for uBlox ZED-F9R and uBlox ZED-F9K to find their differences
Currently we have uBlox ZED-F9R but at the time we were buying it (a few months ago), a new uBlox ZED-F9K tailored for automotive domain was announced. At that time upon direct request they (the producer) refused to sell it to us with the explanation that their production is fully reserved for the automotive industry. But it appears that it is now available as a on a breakout board from Sparkfun: https://www.sparkfun.com/products/18719. I am going to buy one or two pieces immediately. In the meantime, it will be useful to study the datasheets to see what exactly is the difference between the two versions. Is it just the satisfaction of some automotive standards or does the K version have any new functionality or better parameters?