My son's 2007 2IS250 is making some noises when going over slight offsets in pavement or into our driveway like the suspension is dry? I have pushed up and down to check shock bounce and no noise and shocks seem fine. When slow rolling into our driveway or parking lot speed bumps and low squeak possibly sway bar noise? Not sure how to better diagnose the sound or where it is exactly coming from, but annoying like cheap components somewhere. This car is bone stock with 67K and I just tried a little wd-40 around the sway bar to see if i could at least isolate it to a component. Dealer hasn't noticed anything during last 2 visits, but that doesn't mean much these days. I would appreciate any insight anyone may have to this noise only at odd angles and slow speed. Certainly sounds like dry rubber, but not sure how to access the places that this could be common.

 

try wiggling the exhaust tips to see if it’s the exhaust. There is a joint where the front pipe meets the back pipe with the mufflers, somewhere under the car near the diff in back. That was squeaking on mine once upon a time. I had my resonator deleted before I got around to fixing that sound because it was beginning to rust at the seams anyway.

 

I checked the exhaust hangers and could not replicate the sound., so I continued the front end pursuit. I ended up spraying some 303 protectant around the top mounts of the front struts and this seems to have helped. I have no idea how long this will last, but I'm a couple of weeks past the treatment and things are quiet again. I'm sure there is other dry rubber situations to come due to age but I'm at least onto something with the top mounts in my situation.

 

I recently had to change out my front lower ball joints. I'm around 96k. My car sounded so bad.

 

+1 on ball joint. It will also help tighten that loose steering feel a bit. But the "looseness" was still there until I upgraded to the ISF steering ecu. The car does drive straight now and especially if I have passengers.

 

Hi
On my 2009 Lexus IS250AWD two years ago (78K KM), I had the same problem. I live near Montreal canada where winter is very cold and summers can be very hot. My mechanic had to drive the car and used some lubricant like WD40 to the connection(like rubber bushings) that hold the torsion bars, and after 15 minutes after applying that , the problem was gone, and still is.
Good luck

 

sway bar bushings