I am excited to be associated with UBC and hope that it will benefit me. I bought used 740i 2001 and spent nearly 7 grand to put it in shape. The car was in excellent condition body and interior and engine was in excellent shape. Recently I have noticed that the engine light is showing and when I got the computer check done it showed fuel cap needs replacement. I did this and after a few days the light showed up again any idea why this is happening. Took to the BMW mechanic and he told me that he needs 24 hours to keep the car to check the leak and could cost quite a bit.