I have Kia Picanto 2020. Same issue. Dashboard rattle noise specially from the sound system side. Lately my steering wheel has started rattling too right in thr middle where airbag is. Used to do it on bumpy roads but now it does on not so bumpy road as well. Would highly appreciate if someone could help me out. Went to Kia Mecca but they're a stupid bunch of sales people. Spent around 30K in multiple services still no solution.