Correct

The 20" rims sport 245 section rubber as do the 21" rims. So no wider just shallower along with increasing unsprung weight, which for me would make them pointless on the XC40. But if you like the look then go for the 21".

Yes, typically a message will appear on the centre screen and you will get a notification in the phone app.

Nope, no hotspot. And no place to fit a second SIM.

I honestly doubt it's the few mm difference in tread depth causing the issue as the iTPMS Reset calibration will take that into account.

The iTPMS takes time to register each wheels rotation pattern in respect to the others under different driving situations when you perform a reset. So cannot see, however unwise, having worn tyres on one side would cause the false warning. I assume you have performed a full reset and driven the car ...

Thanks for the correction and clarification eugen61. The inaccurate post could have deterred someone from buying a car with the excellent Pixel Headlights, which are worth every penny if you drive at night on unlit roads.

Yes, you can move from D to R when the engine is auto stopped. It starts again when you do.

Where I live I hesitate to call them roads and the 20" rims are fine. The tyres are 45 profile so still quite a bit of tyre wall to absorb potholes. And it does improve the handling a little.

Strange, the brakes on mine are good, indeed better than those on my previous MY21 XC40. I drive various cars and don't notice any difference between them.