I posted this in another thread, but wanted to make sure there was visibility in this one as well:
Just wanted to throw in my recent experience, with TLDR at the end:
Took delivery of a 2023 MYLR in October 2022. Immediately noticed a noise like a dentist drill when accelerating. I had driven a couple of other LRs and never heard anything like this. I got a service appointment in December, and the first tech told me they needed to replace the front motor. Then they called back a couple of hours later and said, never mind, it's within spec.
A few months later, I went in for something different, and mentioned it during that service visit, but was told it was still within spec. I suffered through this noise for a few more months, with it gradually getting worse, and additional noises crept in, like a pulsing or warbling noise when cruising at low speeds. I took it in again last week, after a test drive at my local sales center to reassure myself that I wasn't crazy (the test drive car was almost dead silent except a very brief and mild dentist drill sound when accelerating). This time, the service center told me they would charge me $530 for diagnostics, and I should have brought the car in sooner if it was really a problem. Then, after keeping the car and not updating for a few days, I notice in the app that they replaced the front motor, with no payment due.
I got the car back, and it still had a dentist drill noise when hard accelerating, but otherwise was almost completely silent, like a different experience altogether. The shop manager went on a ride-along with me after I complained about some noise still being there. He said they use a tool to measure the noise levels, and only if they pass a certain threshold are they authorized to replace the front motor. It is a well-known problem, and he said there are lots of cars out there with this issue, but they can't do anything until the noise passes that point. The shop chief also said that there are 3 main places people hear noise. From the front, from the back, and from the back seat. The only one that is fixed with the penthouse perimeter seal is the back seat noise (which is normal inverter whine creeping into the cabin). The other noises from the rear, and the front noises, are due to motor defects or other issues with sound dampening insulation (or lack thereof).
Eventually, if my motor passes that threshold again, they will replace it again, but until then, I'm left with a car that is worlds better, but still not as silent as 3 other LRs I've driven (or 2 others that my friends have). The shop chief did mention that I should report the problem in the app's suggestion feature (which I'm trying to find), and that if enough people do so, the engineers at Tesla might take notice and issue a service bulletin to add insulation to the front, but until then, they are not authorized to make changes.
TLDR: It took 3 service visits to get my front motor replaced, which mostly solved the problem, but some high-pitched whine remains. Was told by shop chief that we should all submit suggestions for improved sound insulation in front, otherwise they can't do anything.