I've had this issue recently when starting my 2019 Lexus NX300. I thought perhaps it was an issue with my phone so I got in the habit of turning my phone off before starting the car. But, the screaming sound still happens periodically with my phone turned off only when I start the engine. It's a high pitched shrieking sound, almost like an alarm, and it last for maybe 5 -10 seconds and goes away. I've tried turning the stereo off before shutting the car down hoping it would not scream when I start the engine again. This occurs with my android phone as well as my wife's iPhone, so I'm pretty certain the issue is with the car. As far as I can tell, this sound is coming through the speakers and it's very loud.

 

Hello and Welcome to the forum and posting your 1st post...

I haven't had your issue and not sure if it's been discussed on CL prior to my joining. I'm a recent noob myself and hopefully, someone will chime in with info re your unwanted sounds.

I will do a quick search to see if anything similar pops up and update my post if anything does.


EDIT: I only found this thread and it's long.

https://www.clublexus.com/forums/nx-...ns-thread.html


Maybe the next thing to do would be taking it into dealership to ask, or a Japanese import specialty shop or maybe a stereo specialist shop. Let us know if you find help, what the issue was and how it was resolved. That would be helpful for anyone experiencing the same issue as you going forward. Good Luck !!