Volkswagen Group of America is recalling 101,938 2013-2015 Audi A4 and S4 vehicles manufactured from 16 February, 2012 to 21 October, 2014, and 2013-2015 Allroad vehicles manufactured from 12 March, 2012 to 21 October, 2014.

Due to an improper algorithm in the air bag control module, if a crash necessitates deployment of the side air bags, a second impact to the front of the vehicle may not command the front air bags to also deploy.

If the front air bags do not deploy in the event of a secondary impact to the front of the vehicle, there is an increased risk of occupant injury.

Audi dealers will update the air bag control unit software, free of charge.