Wanted to give an update on my 2023 Rattles which finally got
RESOLVED after a Saga which eventually ended with getting the General manager into the loop given how much attitude the Advisor was throwing around at Palo Alto SC and even started telling me that he would charge me for the service because apparently 'Noise' is not covered under warranty. Hope this post helps anybody who is still frustrated with the rattles.
So two things that were causing this,
1 - The rear seats were not bolted properly into the frame, and there are two seat heating components which are just attached to frame and sit below the seats. The one of the right rear was not fixed properly, and this was the main source of noise when going over bumps it was hitting the metal frame and rattling.
2 - The left rear window was not fully attached to the regulator. The glass was vibrating and hitting the regulators when going over the bumps and hence the noise of rattles. If you gently tap on the door when glass is upright position, the glass should not wobble. I saw that happen and SC was initially reluctant to look into that but the GM also reluctantly agreed to look into that. I had been telling them this was the issue from Day1, and for some reason SC is not willing to admit there is fault there.
Anyways, finally after 3months and 5 SC visits, got the issue resolved! It does not rattle when going over bumps and tested it well on the dreaded El Camino Real road. Also, the Model Y rear seat rattle is a known issue, so for folks with the problem please ask them open up bottom of the rear seats and check for loose wires/elements.
I know how frustrating it can be drive around with the rattles, I am so much at peace with the car now and feels good to drive without being frustrated. Hope this helps!