Same here, between 80-90 km /h on the highway and only if I slightly press the acceleration to maintain a steady speed . Over 90km it goes away . The best part I started the car (cold start) one day and a loud knocking noise was present , got me worried. Same thing the next day I recorded audio and video , went to the dealer and apparently it’s normal !!! And they mentioned a video is not representative to point out there’s an issue and as far as they are concerned all is good.

. Unfortunately the service after sale is quite dismissive… and I also have a rattling noise at low speed. Twice in service and same answer all the time , cannot reproduce the noise. One morning I jumped in the car , drove to the dealer , took for a test drive the manager from service and he confirmed the noise … what do you know so I am not crazy cause that’s the attitude I was getting from the reps when calling and complaining. Will bring the car back this Friday, will see, but unfortunately for me I became a detractor and I will never recommend for someone to buy Genesis , since they have a hard time understanding that a luxury brand comes with service after sale …