Today wasn't the first time I've had the warning for inoperative front crash sensor.

 

I gave it a wee wipe to get the rain off and normal business was resumed.

 

I think it's a bit too sensitive to a drop of rain. I expected to find at least a big leaf stuck to the front grill.

Mine did it once in a very heavy downpour, not since.

Although I did get a message that my blind spot detection was disabled for some reason in crawling traffic today.

Got it 3 times in heavy rain in Scotland (!). Set it from "early" to "late" and not a peep out of it since. Not even in Yorkshire rain.

Only had that in a horrendous downpour once. Not surprised the sensors were impaired - I certainly couldn't see a damn thing.