A mucky business

HERBIE, a Volkswagen Beetle with a mind of its own in a series of Disney films launched in the 1960s, had its share of misadventures. But things had a way of ending up happily for both the car and its passengers. The German carmaker’s more recent attempts to give its cars the gift of thought have things headed in an altogether grimmer direction. Its use of hidden software to deceive American regulators measuring emissions from diesel-engined cars has plunged VW into crisis. And as the scandal provokes further investigations it seems likely to throw into question a wider range of claims about emissions and fuel efficiency. It could thus be a blow to much of the industry—one that might be large enough to reshape it.