That's the best way to describe it.
It's time to start a new thread dedicated to this noise to see if anyone else has experienced it with their vehicle.

I have a 2024 ES-350 and currently this is the only remaining issue I am dealing with, with my car.

It's quite quiet but can be clearly heard.
I'm trying to get an understanding of when/why it happens, but so far I don't really have
any leads.

It can start to occur when I've just started my car or have been driving 5-10 minutes.
I don't see any pattern as to if I am near a car or not.

I hear the noise to the left and behind me. It must be coming from the speaker there.
Since I have disabled the front speakers and the front left side speaker I don't know if I
would hear it from them also if they were connected.

I am certain I can't be the only driver here who hears this noise.
It really never goes away, from day to day, week to week, month to month.

Any guesses/ideas what it could be?
What could I do to troubleshoot it?

My goal is to get my car totally noise free but I'm not quite there yet.

This is NOT a mechanical noise!
It is electronic-based, likely triggered by a sensor.

 

Don't hear any strange noises from my ES. Could you provide a video recording maybe?

 

Sure, here is an audio recording of it.

 

Is that audio clip with the car parked/idling?

 

A rattle?

 

That would be annoying sounds like something is loose. I hear a fan running in that direction wonder if that could be the same source.

 

It really does sound like a geiger counter.
I have never heard anything like that before.

 

I would start by removing the rear door panel and see if you can identify anything moving or squeaking. it's in there i bet.

 

No I was driving. But it will also sound just after I have started the car and not driven yet.

 

Most emphatically NOT a rattle.

 

Just as I wrote, when something is loose it falls into the 'rattle' category and this is nothing at all like that.
A rattle, does not spontaneously start and stop while your car is idling at a standstill.
That alone should tell you something.

 

Please read my last responses. What you have suggested makes no sense at all.
When something moves/squeaks, something is causing it.

This is not a squeak. This is also happening when the car is not moving, and spontaneously starts and stops at the intervals you can hear in the clip I posted.

 

I know I am grasping at straws, but it's more in line with a sensor going off/being triggered by something.
That's my best guess.

 

you're new here so you don't know i'm the pioneer for de-squeaking, investigating, and fixing noises in the Lexus ES. Not a pioneer, but the pioneer.

Go fix your own rattle trap then

 

ok maybe not new here per your join date, but due to your low post count, ive never seen you post. clearly you dont know you my record here for fixing broken new lexuses.