The decimation of share prices across the autos industry this week highlights growing concerns that Volkswagen's problem could quickly turn into one for the entire carmaking industry.
The U.S. Environmental Protection Agency has accused Volkswagen of installing a device in its diesel vehicles to run maximum anti-pollution controls only when emissions tests were taking place. VW has admitted the mistake and apologised, with its U.S. boss, Michael Horn, saying the company had "totally screwed up."
No other car manufacturers have officially been accused of this kind of behavior. However, the light shone on what Volkswagen was trying to sell as emission-reducing cars, which were in fact pumping more nitrogen dioxide (NOx) into the air than thought, could be uncomfortable for others.