Sensor gone?

2011 325D, 135k miles, M Sport

I’ve got the following crop up at the same time:

- brake pads low (look more than fine to me)
- abs off
- start assistance
- flat tyre monitor

Check control says the brake pads are the rear.

Someone else was driving at the time, they went up and down a kerb when parking when it happened.

Anyone had anything like this?