I have been having the same problem too. The warning pops up at least once a week. My mechanic tells me that the bulbs are working perfectly hence it must be the contacts. They tried cleaning and filing the socket to give the bulb a cleaner contact but to no avail. Luis, do you know where the sensor is located? Thanks. See Meng 97 E36 AC Schnitzer S3 3.0 Coupe ------------------------------