That deadline coincides with the 45-day mark after VW received its Sept. 18 compliance letter about the diesel issue. In fact, California regulators may well start testing non-VW diesel vehicles to see if any other automaker installed software that would cause diesel emissions to be underestimated. Other German automakers such as BMW have boosted their diesel-vehicle production in recent years in an effort to meet tightening greenhouse-gas emissions and fuel-economy standards.
VW has estimated that as many as 11 million light-duty diesel vehicles may include cheating software. Given that California is the largest US auto market, many of those vehicles are tooling around the state. In all, Volkswagen has earmarked $7.3 billion to address the scandal's issues, while former CEO Martin Winterkorn has stepped down and has been replaced by Matthias Müller.