Hi guys, I'm driving previous gen Elantra (pre facelift). Recently my car have this knock knock noise from suspension (I suppose) when going over hump or ascending lane. I went to check at workshop and the foreman told me that it is steering rack issue and replace a new one  I would cost around 4k. Anyone encounter similar issue before? Please advise if yes. Thanks!

same question as well, does hyundai very sensitive to modding? like adding UR racing Bar and change breaded Brake line? or even after market suspension? thankx guys!