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Glad to hear your brake issues are slowly resolving. Your sound was occurring while braking though, right. Not after coming to a complete stop and then letting off the brake pedal?

Update: Dealership has been in contact with Kia. They are requesting another look, planning to keep the car for 1-2 days to do some more diagnostics.

Thanks for the reassurance. Just annoying to have a brand new 40K car with weird noises. I also do notice the sound if the auto-hold is on. Specifically, sound occurs once the auto-hold disengages from a stop just before the car rolls forward. Think that?s consistent with a dragging pad...

Yeah, almost right after the video starts. Mid-pitch hum for a second. I recorded long enough to hear it twice. I was trying to hold the phone against the armrest since that?s where the vibration can be felt but then I got the rubbing noise from the console too.

I have both the idle stop/go and auto-hold off (yellow light on Idle stop/go is illuminated). I?ve tried with it both on and off and it makes no difference. The hum/vibration is short if I quickly let off the brake pedal after a complete stop but is drawn out if I release it slowly. There is...

No, they had no explanation other than saying that the stingers are so new that there is little information currently available about potential problems. They said they had to wait to hear back from Kia technical support before they would pursue replacing the brake pump or investigating...

I?m suspicious too. The only difference is I don?t notice any sounds or vibrations when braking. It?s only after coming to a complete stop and then letting off the brake pedal that I hear the hum and feel the vibration. How many miles did you have when your issues started?

Update: I took the car in today to the dealership. I was able to replicate the vibration/hum for the technician after a short drive. He did inspect the brakes and felt that the hum is normal and secondary to the brake pump. I asked if they would let me take one of the other stingers for a drive...

I too have noticed the aggressive downshifting and inability to brake/decelerate smoothly. Any update on your brakes?

Yeah, same here. Now to figure out what the vibration/hum is about.

Auto-hold is working normally. Apparently even after coming to a complete stop, you must depress the brake further to active the auto-hold. So this is not likely related to the vibration issue.

Auto-hold is working now. Apparently you need to depress the brake pedal passed the point where the car comes to a complete stop to activate the auto-hold.

The manual says that?s it?s intended for start/stop traffic so the driver doesn?t have to keep the brake pedal depressed for long periods of time. I may disconnect the battery to reset the ecu and see if that helps since I don?t have a service appt until mid time next week.

Hey guys. Several days ago I noticed a slight/brief vibration that would occur as I lift my foot off the brake after coming to a complete stop. Separate forum posted for this. Today I also noted that the ?auto-hold? feature stops engaging after several minutes of continuous driving. After 5...

Another update: No vibration when driving from a cold start. I turned on the ?auto-hold? feature to see if this could be involved and this initially was working fine. After 5 minutes of driving, immediately after coming to a stop, auto-hold symbol went from white to green (normal function) and...

I suppose ?braking vibration? is an inaccurate description. However the vibration does seem to directly correlate with the use of the brakes which is why I still think it?s a brake-related problem. I agreed that the rotors are unlikely an issue for the reasons you stated above. But the fact...

https://youtu.be/qibmtK7NKYY Here?s a quick video of the sound for anyone who?s interested.

That?s definitely a good thought, though I disable engine start/stop feature when I drive, so it can?t be that. I made an appointment with the service department, who also inquired about the start/stop feature. I won?t have it in until next week but will update once they take a look.

Update: I have experienced repeat vibration again today after some highway driving. I didn?t notice it when first driving around town but after about 10 minutes of highway driving, I noted the vibration after coming to a complete stop on the off-ramp. Again, occurs when immediately taking my...

Thanks for the comments, guys. I have driven multiple times since posting and haven?t noticed a recurrence of the vibration, audible or tactile. I still have to wonder if it was related to the car wash. I?ll post again if it recurs after a wash (or rainstorm).