What is the average cost to repair the supplemental airbag warning light?

Hello, there is no way for anybody here to know what was diagnosed without hands-on testing being performed. Therefore it is impossible to provide an estimate of any kind because nobody who is reading this has been able to check your car personally. I would recommend a second opinion perhaps, seek guidance at a local shop near you. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops