As I stated earlier, there are checkboxes so you can limit access to specific cars. We have multiple Teslas and have been able to limit access to the specific car whenever we sell one.Assuming that’s your only car. I have a new Tesla on my account in addition to the one I was selling.
Use Chat to get your owner Transfer into the queue.
Of course you should contact Tesla to officially transfer ownership but you can instantly give the buyer access to just the one car they are buying.