I've had it a few times in my 325 going through puddles (we get a lot of 'em up north thi knowz). Things dry out and alls well again.
Faulty wheel speed sensor would possibly screw up gear changes in auto mode methinks - perraps the Giraffe/Gorilla/Monkey et al could confirm or correct this? Would also throw a code.
I messed with the adaptions on the 325 and the lights showed along with others and the car wouldn't start, I chose wrong engine ref in Inpa and everything went tits up. An ECU reset sorted it.
Simple brake pressure sensor 1 or 2 about 90£ each from bmw i did Craig's and yanto sensors 15min fix
Sometimes it's not the sensor (despite diagnostics saying it is) but the plug and/or wiring attached to it.
Happened to mine few years ago and a tin of this stuff helped cured the problem. :thumbs:
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