Q: Thumping sound at 40 mph

Join Date: Oct 2017 Location: Los Angeles, California Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Thumping sound at 40-45 mph I could really use some help. I have taken my new car back to the dealer three times and their service department is useless. I have a 2017 Hyundai Tucson that is making a weird noise. Here's what I can tell you about the noise. --It sounds like it is coming from the front end, driver's side. -- It can happen when I hit 40-45 mph (but sometimes it doesn't happen at all). Originally I described the sound as popcorn popping. Slow at first and then faster. But sometimes it sounds like wind resistance. Flap...... flap..... flap-flap-flap-flap-flap. I'm sorry, but I can't tell you for certain if it's a thump or a flap or a pop. --It never happens at slow speeds. I have to be going 40 mph or faster. --Braking or turning has no effect on the sound, other than the sounds goes away when speed drops below 40. What can this be?