Now that I've found the volume control for my sensors I've turned them down so it's not so annoying when reversing with my bike rack.

Thanks all for your advice.

Where is the control? I've got the same issue and recoding will only fix the problem when something is plugged in to the tow electrics.

I don't have the factory ones, so I can't really help you. I just found the source of the beeping which was a little speaker stuck to the interior of the cabin and it had a volume control slider on it.

Genuine Skoda kits don't have a physical volume switch, but the volume can be reprogrammed using VCDS.

As can the pitch of the tones (front & rear are different pitches).