i have similar issue on my front right when going over the hump. I brought my car to Codewerx and they took out and reinstall the suspension and manage to narrow down the cause. Rub some grease on the bushing and somehow it fix the knocking sound.Hi, does anyone here encounter issue with knocking sound from the driver's seat when going over humps. Had a popular BMW specialist workshop to remove the seat to tighten everything but still couldn't solve the problem. Was told even changing the seat frame or backrest frame has no guarantee in getting rid of the knocking sound. Any advice is appreciated.
I was charged for labour only. The entire process took about 2 hours.