They don't charge that diagnostic fee if they can reproduce the customer's complaint. But it is offputting to see a dollar cost estimate on what is clearly a warranted item.I think I fixed the problem.
The sound seems to come from these things.
View attachment 647334
I ordered small paint sponge and inserted them inside like this.
View attachment 647335
So far, it seems the noise disappears. I need to drive more to confirm but that seems to get better.
I am still super disappointed by Tesla approach to attempt to charge their customers for cars having weird problems. I chatted with another Model Y owner in my resident and he had a lot of issues too (even refused first delivery) and the same service center fixed everything for free for him (rattles, vibrations, small paint chips, etc). The willingness to fix issues seems totally arbitrary and random. Having two cybertrucks orders, I am not sure I will take delivery - at least not after waiting a year or two so that issues are properly addressed.