One problem related to air bag on-off switch has been reported for the 2004 Acura TL. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Acura TL based on all problems reported for the 2004 TL.
Air bag light is on and air bag is deactivated due to defective switch in seat belt buckle. Manufacturer has lifetime seat belt warranty but will not honor the warranty because they claim that the switch is part of the air bag system and not part of the seat belt. So my wife and daughter has to drive a car with no air bags because Honda/Acura will not honor their warranty. Should be a recall on this, as it is a common problem.