arentz07

I've asked around about this and gotten various answers. I've been noticing a cyclic chirping sound at less than 1000 RPM. I can't easily hear it while driving unless I roll the windows down.

Here are a couple of videos showing it. It's most obvious at idle.

https://photos.app.goo.gl/gfQPFFZHjvcu5QhF7

Does anyone else have this on their IS500? Mine is a 2023 with 7300 miles.

macmaster

Not sure about this but sometimes I hear a high pitched whirl when foot is off the gas and coming to a stop. For me it only happens at one particular intersection which is uphill and is only audible when my window is rolled down. It's a constant whirl, almost like a buzz, rather than a chirp like yours. Yours sounds like there are crickets in your car or something. I think mine could be this:

https://www.clublexus.com/forums/gx-...depressed.html

jct23

In your video I think I see one of the pulleys on the left side of the engine at the 00.01 part of the video. As you move your phone it looks like the chirping gets louder when you get a clear shot of the pulley.
Not sure if that helps to isolate the sound.

I'll try to listen to mine as I'm driving slow (lol)

subtl

I've actually noticed this as well. Despite on how I drive the car prior. Its always at the intersection before my house, Partially uphill, accelerate a bit then release and I hear the whirling. I kind of just brushed it off for now as it isnt always happening and it doesnt seem to affect the performance of the car in any way. But it did have me worried at first,

wfibear

I just noticed this on my car today, I was only able to hear it with the windows down and only really heard it off throttle, although I’m not sure if it was specifically because it was off throttle or low rpm. I didn’t pop the hood or investigate too closely but now I’m gonna have to check it out more tomorrow; I didn’t think much of it earlier.

marjenmill

My guess would be the fuel pump... Take it to the dealer since it's under warranty and have them figure it out.

arentz07

Thanks for all the replies so far. I've got an oil change scheduled for about two weeks out anyway, so I'll ask about it then. So far, it seems the suspects are the fuel pump or the belt tensioner pulley or belt itself.

vpar23

So I get a weird chirp not necessarily the same when I reverse into a spot but that’s when I’m low rpm so let me check too today

snowyblue

def sounds like a pulley. i would spray a small section of the belt while its running and see if it goes away for a split second

arentz07

Yeah I may try that. Seems weird for something like this to fail at such low mileage, but what do I know?

subtl

my assumption is probably a belt as well cause for me, the sound only comes out once the car has been driven for a good amount of time. also is much more weird for me as i'm barely at 4k miles lol . however, I havent really put too much thought into it as of right now. But if it does get louder, I'll mention it them when i do my service in a few weeks.

jct23

Keep us in the loop and please post any results you get from the dealer.

macmaster

Exactly!! It's like an electrical buzz

arentz07

So I went for a little drive this morning. I wanted to see if there was anything specific that I needed to keep in mind when letting the dealer know about this. Well, here is what I did and what I found.

When I cranked it in the garage, it did not make the noise. I suspect that's because it was a cold start and idling around 1100 RPM. I drove casually for about 12 minutes while things got warmed up. I pulled over into an empty church parking lot to see if the noise was occurring. Long story short, it was. I tried turning the car off, waiting about a minute, and turning it back on again. At first, there was no noise, but after idling for about 15 seconds, it returned.

So then, I decided to do some "spirited" driving, as best as I could with the light rain that was going on. Noting too crazy, just Sport S and manual for a bit, maybe 10-15 minutes of that. Then, I started to head home, which took about 10 minutes. So, I think I was driving for around 50 minutes altogether. Then, when I returned to my garage, the noise was gone. Yesterday, I heard it very easily in the garage due to the walls. Today, nothing. I tried lightly revving the engine to see if I could hear a change in the engine sound as the RPM dropped - nothing. Weird!

Benibiker1558

I think they'll tell you it's just the normal sound from many engine components doing their thing and I agree .