Hi everyone,

2022 Maxima with 15k miles recently started making this weird beeping/squealing noise when the car is off. It does it every 30 seconds or so and even does it with the battery disconnected. No lights on dash, no warnings or errors, no codes when doing a scan, drives fine and I don't hear it at all when the car is running. I've found nothing on the internet anywhere about what this could be. Next stop is the dealer I guess but figured I'd register here and see if anyone has any ideas.

Sorry for long video

 

I don’t know about the beeping but I know that the exhaust system makes a popping sound until it cools off. Since you car has so few miles on I would not be surprised if it still did that. When I first got my 2016 platinum it did that for about a year.