One problem related to air bag light on has been reported for the 2013 BMW 528. The most recently reported issues are listed below.
The contact owns a 2013 BMW 528i. When starting the vehicle, the air bag indicator illuminated. The contact took the vehicle to a dealer where it was diagnosed that the air bags failed. The manufacturer stated that there were no air bag recalls for the vehicle. The failure mileage was 75,000.