Three problems related to front air bag have been reported for the 2006 BMW X3. The most recently reported issues are listed below.
Failure of front passenger airbag safety system as described in NHTSA action number ea08001 for my 2006 BMW X3 (54,700 miles).
Automatic airbag disarm light came on intermittently while adult passenger was in front seat. The light now remains on at all times and the front airbag is deactivated even with adult passenger in seat. Called BMW USA was told my VIN number not included in recall. I have the sport seats and same year as those with problem. Obviously the same issue as other included in recall. Highly concerned car with 55,000 miles will not be safe because airbags won't work.
Experienced a wet floor board in backseat on the driver side along with a puddle in the front driver side. Dealership said it was a seal, they removed the backdoor panel and water test showed the vapor seal had became loose. The next rain, still a puddle in the front - which means that vapor seal went bad as well. Also, water is dropping in from the sunroof controls on the roof. They still function and the seal around the sunroof seems bone dry. I also experience the air bag issue - it was fixed under warranty. But this may be a recall that BMW needs to look into.