I get a bit glassy eyed at these accounts of vibrations and I don*t for one minute disagree that it happens but what I do disagree is that it is down to manufacturing faults. It isn*t possible for an out of balance wheel to get out of the factory and even if it got damaged in transit, the car is run up on a test rig at the end of the production line so it would get caught there. They do NOT allow a car out with a wheel wobble or any other vibration. Where it starts to go wrong is when humans get involved. Before a customer gets his pride and joy, the object that often cost more than the new owners first house is referred to as a *unit* and they are treated with very little respect. Dealers rarely have more land than they need to store units and they are squeezed in like sardines. There is usually an *odd job* man fetching the car off the compound, a mechanic (I refuse to use the term *tech*), a valeter and a salesman all having a little play and any car that has been used as a demo has had every kind of novice testing their skills at it. What I do know is that if a car vibrates it does it because something has happened in that period between being a unit and a possession. If a ton of car hits a curb, there is very good chance that something is going to knocked out of balance or bent.