This is in reference to one of the issues stated in the thread started by jan999 in his "poll: compilation of problems of F30 u encountered". I believe many F30 owners irregardless of whether it is a 320D or 328i (not sure about the 320i yet as no one seemed to have one at this juncture) faced this elusive "knocking" sound from the steering/absorber with some experiencing a slight judder at the steering wheel when the car goes over a small hump or pothole or cat-eyes on the road. The feeling/sound is akin to a worn-out lower arm bushing. The problem is that the sound only comes intermittently and only when the car rolls over the hump or pothole at a certain angle, thus resulting it being difficult to pin-point it to the service advisor/technician during test-drive for them to really look into it. This predicament had resulted in this very issue being left unresolved up until now.
I had my car checked for the first time about a month back but the Service Advisor cannot detect the sound so nothing can be done then. However, when I sent my car in this morning to rectify other problems (also one of those usual suspect) I again got my Service Advisor to try to identify the sound and this time he managed to hear it. He checked and said that it is due to some design defect of the Steering Rack and said a few have also complained about similar problem. I told him not a few but a HUGE MAJORITY!!! (hahaha) because I have been in touch with quite a few f30 owners out there who has the same problem (thanks to the forum). He said a rectification note has been sent to BMW and apparently the R&D in Germany is trying to come out with an upgraded Steering Rack but when will it be ready to be shipped out, he doesn't know.
So guys, you just have to hang on there for the time being. But in the meantime, for those of you who have this problem I would appreciate if you could file in an official complaint to your respective dealer and get them to officially escalate the said problem to BMW Malaysia and Germany so that the relevant people in Germany know the extent of the problem and have a sense of urgency to quickly come out with the upgraded parts.