It's certainly possible, your best bet is to have a shop the does suspension work and alignments check it out (unless you have the equip and training to do this, springs can be dangerous). If you take it to a shop though make sure the guys know beemer. They're not to different from normal stuff but they do have their kinks. Have you taken a look under the car and done a visual? When did you first notice it and what may have happened just before? Most likely that'll give you your answer.