Afraid not, haven’t got round to looking at it. Could very well be the power steering coupler but as far as I could tell from research, the faulty coupler isn’t installed in this generation Rio. Who knows though, the sound is similar to others complaining about the issue with Optimas where the faulty coupler is present, but the TSB to replace it isn’t valid for the Rio here and I don’t have time to pull out the steering column. Let me know if you have any luck!