We have a 2017 Discovery Sport which to date has had no electrical issues until now. Just a few days ago many of the system alerts came on / were disabled. This includes DSC, Stability Control, ATPC, and the Airbag light. A big culprit in my mind was a faulty Wheel-Speed sensor given we drive the car regularly (ex: apps 2-3 days a week for 6-mo of the year) in ice, snow in etc. The car has been a workhorse with now 137K miles, so many more than a typical DS with the same model year. So wheel sensors, right?
As it turns out, the dealer found its not that nor the ECU modules, but instead corroded connectors for the wires leading between some of the ECU boxes. 8 labor hours in and the are still debugging which ones. The car has never been submerged but they say the corrosion is typically only found in those scenarios. I'll post an update when we know more. Ugh!