I’ve had this exact same problem with my wife’s car two times about two years apart. Your oil leak is frying the voltage regulator inside your alternator. When your battery voltage drops below 10 the motor can’t run right and the airbag light is used to flash the error code. The oil leak is very common on this model car and is coming from your front main seal, timing chain cover, or valve cover gasket. Fix the oil leak, replace the alternator, replace both belts and top radiator hose because they are oil soaked and should explode soon. I guarantee 99% chance your problem is one of these.