I also hear it other times besides when I first get in the car, even when it is in my garage just charging, or sometimes when moving forward slowly, then a second or so after going into reverse. I was concerned this was an issue with the lower control arm bolt(s), but I've checked, and they are all tight, and I don't see any other possible bolt under the vehicle or under the service panel being loose. Are other owners hearing the click/thunk sound during these times?