Not updated this for a while. We had a random 'airbag' light come on after Christmas. Checked everything and couldn't find a fault. Came on again during Feb, so bought a new code reader. Initially the reader reported it couldn't connect to the air bag control module. Unplugged the module, and reconnected it. Bingo - Code for Clock Spring showing.
A used part was bought then fitted. Bingo the light went out. A couple of weeks later, light on again. Couldn't get the reader to connect. Tried again with another clock spring, no change.
Hmm, wonder if the control unit has gone faulty. Another search on
ebay, £20 for a used C1 control unit (same part number). Fitted that, and the light went out, and has been for over a month and about 1,000 miles.
It's currently back in service as son's run about, as his car's clutch went after a long track day ! He's got a spare, but the weather hasn't been kind. Add to that, my son was made redundant, so his van has gone back.
The Aygo went to London and back last weekend, just over 500 miles.
It will be due an oil change shortly.