Low grade (and annoying) vibration between 30-50mph

[secondexplorer]

I have a 2020 ST (bought brand new, about 10k miles now) and while I loved driving it at the beginning there is now a low grade vibration/feeling that starts around 30/35mph and seems to be noticeable until about 50mph. I've felt it with both my summer and winter tires on and it's super annoying because most of my driving is "in-town" so I'm almost always going between 30-50mph. It comes from the front passenger side and when I hit that speed it almost feels like I'm driving over small bumps all the time!!! Mostly the feeling is in the gas pedal, but sometimes it feels unbalanced the same way it sounds when you only have one window open, not an actual thumping sounds but a feeling in the front of the car. Anyone else have this issue?!? What could it be? Dealer hasn't noticed anything out of the ordinary during tire changes/routine appts. No accidents, serviced regularly. Thanks

 

[GearHead_1]

Loose fiber shield under floor pan? Just a thought.

 

[Dave G ST]

Are you using the same wheels with the tire changes? Could be a slightly bent wheel. Something may be loose in a suspension part. Go to another dealer if need be to have it resolved.

 

[scoobysportD]

I have a 2020 ST (bought brand new, about 10k miles now) and while I loved driving it at the beginning there is now a low grade vibration/feeling that starts around 30/35mph and seems to be noticeable until about 50mph. I've felt it with both my summer and winter tires on and it's super annoying because most of my driving is "in-town" so I'm almost always going between 30-50mph. It comes from the front passenger side and when I hit that speed it almost feels like I'm driving over small bumps all the time!!! Mostly the feeling is in the gas pedal, but sometimes it feels unbalanced the same way it sounds when you only have one window open, not an actual thumping sounds but a feeling in the front of the car. Anyone else have this issue?!? What could it be? Dealer hasn't noticed anything out of the ordinary during tire changes/routine appts. No accidents, serviced regularly. Thanks

Have you ever found out what it was or how to fix it?

(long shot seeing only 1 post but still... better than no shot )

 

[mwingnut7]

I have this to…just when I start out in the morning. It appears to go away after the fRistov few minutes of driving. Bad tire?

 

[09flhx]

We have a 2021 ST and we started getting a vibration that sounded like plastic gears grinding. This only happened when we first started the car and when we pulled out of our driveway. It went back to the dealer and they thought it was the spacers at the top of the struts and they replaced the struts. As soon as I drove it, I heard the sound. It went back.

The Tech did not get my explanation of the sound and when I told him what was happening he was able to recreate it. He researched and found a few similar reports and they referenced a bad transfer case. He disconnected the transfer case and had me drive it. The sound was gone. They replaced the transfer case and solved that issue. Now there is something loose that they missed that pops up at 16 mph as I am coasting to a light. It sounds like the fiber cover but they already replaced that. It goes back next week for that.

I hope this helps.