hattig writes: Today VW's Michael Horn is testifying to Congress and has blamed the recent scandal on engineers saying: "It's the decision of a couple of software engineers, not the board members." However, 530,000 cars in the U.S. will need to be recalled for significant engine modifications, not a software fix. Only 80,000 Passats are eligible for the software fix. There is no word on the effects these modifications will have on the cars' performance, fuel consumption, etc. The BBC reports: "The issue of defeat devices at VW has been a historic problem, points out a Congress panel member questioning VW US chief Michael Horn. In 1974, VW had a run-in with US authorities regarding the use of defeat devices in 1974, and in December 2014 it recalled cars to address nox emissions."