About 850,000 Audi A4 models have been recalled around the world to fix faulty software that may prevent the front airbags from deploying in a crash. The recall affects current-generation Audi A4 sedan and Avant and Allroad wagon variants produced between November 2011 and this month. The issue is unrelated to the multi-million-vehicle Takata airbag recall that has impacted several car makers around the world. Almost half of the vehicles recalled are in Germany and China, while approximately 100,000 are in the US. Audi Australia confirmed that 6716 model-year 2013, 2014 and 2015 A4s are subject to the recall in Australia. Affected customers will be contacted from next week to arrange a recall service appointment with their local repairer. Audi says the fault can be amended in about 20 minutes with a simple software update. The German luxury car maker adjusted A4 production at its Ingolstadt and Neckarsulm plants to remedy the defect last week, adding the updated software to the lines. It says the fault was discovered during routine quality assurance tests of the A4, adding that there have been no reports of accidents or injuries related to the defective software.