Part 1 BMW X6 f16 tweet/chirp/squeak? Rear wheel driver side

[Technonerve]

Hey everybody, I am new to the forum, I wonder if someone can help me, I purchased 3 weeks ago a bmw f16 x6 2018 xdrive 35i with M sport package (and suspension) odometer 740KM today, I am experiencing a very annoying sound from the rear wheel driver side region which sound like a cricket or bird tweet, very short, on very sharp bounces of the wheel on uneven roads or bumps, u can hear it more in closed parking areas, or on roads where u have barriers on the sides. I can't replicate the noise on bouncing the heavy sav, I'm definite it's coming from the rear wheel area and it's not from the interior because when windows are closed I can't hear it. It doesn't disappear when brake is on. I took twice to bmw, first time the mechanics didn't hear it (I did) and he said I'm not sure what u r describing to be able to work on it. Second time I took it I makes sure another mechanic drove the car and heard it, he said it's not the suspension, continue in part 2

[Technonerve]

Part 2, he said drive it till 1000km and bring it back we will try to put a different wheel and test it (20" Dunlop wheels). I am not convinced of what they are saying, I went underneath the car everything is new! Nothing loose or touching as far as I can see, I lubed the rubber bushing of the exhaust, and still the same noise I even took my GoPro and filmed a clip but nothing shows while the tweet happens! Is that something known with f16s? I owned an e92 2007 and a f30 2016 lci before with no noises! Thank u

[Technonerve]

Please check the video I uploaded on YouTube focus on the "seek seek" "tweet tweet" sound it's driving me crazy
https://youtu.be/797vIC-7rVQ

[Technonerve]

Found the culprit!