A few days after I bought my z4 I noticed a slight bubbling under the paint on drivers door, just under the wing mirror about 20mm long, called in the local dealer and asked them to inspect it and could it be done under warranty, they took a few pictures, rung me the nex day to book it in and informed me they would fit a complete new drivers door and respray/blow both wings in , not bad at all for an eight year old car.....