Hello there!
I've beenan owner of an IS350 for a while now. I drive the car pretty much everywhere. I loveit! It's been great to me and a thrill every day. But for a while now I've been noticing thatsomeplastic has been creaking loudly whenever even just a little bit of pressure is applied. I was told by my dealer that this is normal wear and tear, and considering that I am arather heavy guy (260lbs)I didn't put it past it. But I just think that such a car shouldn't have this much noise. My wife has an SRX of about similar ageand it creaks a tad under stress, but not nearly as loudly or easily influencedas my IS. It's actually difficult to take note of after driving my IS.

Are there any solutions foraproblem like such? Preferrably quick and cheap if at all possible!
Thanks much!

The dealer has to fix it its warranty.

ask dealer to check the arm suspension, stablizer links or the rubber bushes, shock absorbers,it could also be the top bearing on youre absorbers.

ask the dealer to see thru em.. no matter what weight you are yet these should not be give creaking sounds on youre car.unless ure half ton in weight lol.... i dont think so it be the case
but hey, you must persist with the supervisor of the dealer if youre car is under warannty.

good luck and cheers!!!