due for inspection? where u located?
airbag/oil lights... best you go and have your car scanned to eliminate the guesswork.
** in bimmers, most common airbag problem is the mat sensor under the passenger seat. If u just came out of a carwash or you drove in the rain, then the sensor may have been damaged.
oil lights.. make sure oil levels are where they should be. re-check.
sound... rattle? what kind of noise... metal-to-metal, metal-to rubber? constant... intemittent....? does it happen only when wheels are straight, when the wheels are turned, or doesn't matter...? sounds when u brake hard..yes? no?
defective or loose parts sound in different ways-a more accurate description will help