Help! – 35d Randomly dies with DSC & X-Drive malfunction warnings displayed

[Best4x4xFAR]

So this started about 3-4 days ago. My wife was sitting in a parking lot in drive, with her foot on the brake, and the engine just died, with a host of DSC & xDrive warnings on the iDrive screen, and the traction control (yellow) ‘BRAKE’ and 4x4 warnings in the instrument console. A simple turn off and restart seemed to be fine, all warnings gone, engine started with no issues.

The next day she was coming to a stop and it did the same thing, but shifted into neutral as well as she was still moving. Press the start button and it restarted, warnings all still illuminated, shifted into drive and off she went. When safe to pull over, she did, and turned it off and restarted, all warnings gone, truck started normally.

But then she was driving along at about 35-40 mph and the same thing happened. Luckily there was a safe place to pull over. Again, turn off and restart with no issues.

So I pulled the codes with a Foxwell. There are some engine related codes I am already aware of (EGR plausibility, SCR efficiency, DPF nearing end of life, and a bad glow plug), but this is what is new, and the online sites I usually look coeds up on have little if anything. Searches of Bimmerfest, xOutpost & Bimmerpost/xBimmers don’t seem to be turning up much.

I did find this thread (https://xoutpost.com/bmw-sav-forums/...s-dsc-etc.html) that has similar symptoms, but far more acute I guess, and we haven’t had any major rain storms, or signs of water in the interior of the car. My wife did have the car washed at our local BMW dealer the day before this started however. I guess I should take the cow apart and make sure it is dry down around the DME, maybe one night this week if I can get out of work early enough…

Anyway, there are multiple errors that seem to be related to communication failures between modules?

Truck has 140K miles on it, Battery was replaced with a BMW branded 105AH AGM battery 1.5 years/23K miles ago. I changed the oil and filter and cabin filters 3 days before the issue started. Doubt that is related, but it is all that has changed since the issue started.

Hopefully someone has experienced this?