salamaa

i have 250h 2010, i hear crackling inside the car while am driving on uneven street

Clutchless

Have you had the rear control arm recall performed? Look at this thread https://www.clublexus.com/forums/hs-...call-info.html

Otherwise, it could be anything and sounds as vague as cracking are very difficult to diagnose over the internet. Try posting the sound.
It may pay to have a mechanic look at it.

salamaa

the sound look like if u have a tool box inside the cabin and crackling every time i drive on uneven road or over bump.

Clutchless

Then you need to have the dealer (if under warranty) or another mechanic check it out. It could be dangerous if a suspension component is getting loose or failing.