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Discussion Starter · #1 ·
I have an 01 is300 and the front end really creaks and I think the back may be creaking too. What could cause this? The car has 106k and has the original control arm bushings. Would this cause this? I had an sc400 and there were a lot of threads on this and people replaced the entire suspension before one guy posted that some bolts were out of torque spec and had to be retorqued and the creaking went away. I notice the creaking when pulling out of my driveway, going around some turns slowly and other lower speed situations. I cant really tell if it happens at higher speeds as I really dont hear it. I also know it is coming from the front, but do not know if it is also in the rear. Anyone else experience this?
 

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I hear that creaking as well. Usually it's and very low speed turns (under 5 mph). I know I'm missing a couple bolts from my triangular under brace though, so I'm guessing that's my problem. Keep us posted if you find anything new.
 

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Same hear. I usually hear a creak in my front undercarriage when I'm backing up. I first noticed it with the onset of the cold weather, but I've only had my IS for a few months so I don't have much of a basis for that.
 

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I have the same (sort of) problem and just got back from the dealer. They said that the front lower control arm bushings are worn and that is making the noise. They then quoted me $850 to fix it, saying that the entire control arm would have to be replaced because they cant just swap out the bushings. Does any one know if there is any truth to this?
 

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well the bushings are bad but you can get an aftermarket bushings set but your gonna need a press to push them in and out but i dont know what company makes them any one else knows here?
 

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I had a customer car in quite some time ago with a squeak/creaking type noise in the front. Turned out to be what I assume is a height sensor in the front. Took me quite a while to locate this. Hopefully one of you can benefit from it.
 

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Discussion Starter · #10 ·
height sensor? I notice if I jack my car up, it will make the EXACT same creaking sound I hear from inside the car. I know that sometimes cars will creak a little when being jacked up, BUT this is not the normal little creaking. The creaking always occurs when I get to a certain point when jacking the car up and I can repeat the noise by lowing and raising the car. it does it 100% of the time and always at the same heights.
 

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a "height sensor" eh? part number please if available?
I dont have a part number handy sorry. I'd have to have my parts dept call lexus and get it.

I was unable to produce this noise on a standard lift. If the front end of the car was jounced it would produce it. It's a small electrical box with a harness connecter, and almost like a tie rod attached to it that runs to the lower control arm. If you put your hand on it and have a friend bounce the front end of the car you will feel it and hear it if thats the problem.
 

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I read a lot of posts on this since my car was "creaking" on bumps and turns drivers side front. I tried front sway bushings (which is super easy) and didnt help. got the car up on ramps and bench pressed the suspension just enough to narrow down where creak was. Replaced lower ball joint and all fixed.
 
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