The air bag warning light and passenger side air bag off notification light may illuminate due to low battery voltage. If this occurs, the passenger air bag will not deploy in an accident. Dealers will reprogram the air bag control module software. The Audi recall number is JR. This recall began on December 5, 2006.
 
Recalls
Recalls are issued for cars with safety-related defects or problems
2006 Audi A8 Quattro
Air Bag Warning Light and Passenger Side Air Bag Off Lights May Come On
Body, Interior & Misc., December 5, 2006
The Airbag Warning Light May Illuminate
Body, Interior & Misc., November 30, 2005
RepairPal Expert Overview:
A problem with the wiring harness may deactivate the front passenger air bag. The air bag warning light and the "passenger air bag off" message would appear, causing the air bag not to deploy in a frontal crash. Dealers will repair the wiring harness free of charge. The recall began November 30, 2005. The Volkswagen recall number is JJ.