After keeping the car overnight I am getting a weird sound when starting the engine. the car start normally and if I switched off the car and star the engine the sound will come however with a lesser and if I did the same action again the sound will disappear.

find below a YouTube link for the same


please help.

my spec: 2017 IS 350 F

regards

 

Best guess is something going through a self check on ignition on. Maybe HVAC system.
Obviously doesn't sound normal...you're still under warranty...back to the dealer you go.
Make sure you have the video on hand, cause guaranteed it won't do it when you get there.

 

the dear told that steering column was in need of lubricant. for some reason, it dried out. I have been using the now the vehicle for a week and sound didn't appear.