There are about 100 million lines of code in modern cars, according to PwC – far more than a passenger jet running 14 million lines of code, or a fighter jet with about 25 million. Therefore, it should come as little surprise that software fixes now account for over 20 percent of automotive recalls, according to an analysis of 10 years of National Highway Traffic Safety Administration data by DeMayo Law, as reported by Ars Technica. For better or worse, this represents a significant shift in how recalls are handled.