Dieselgate scandal deepens, now involves Audi and Porsche models

There seems to be no end to the Volkswagen dieselgate scandal which involved millions of vehicles across various countries that have been designed to cheat emissions tests using Defeat Device software in the cars' computers. While the initial scandal revelaled that various diesel VW models dating back to 2009 were outfitted with the defeat device, we are now finding out that this now involves newer Audi and Porsche models. 

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VW forced to recall 500,000 vehicles due to allegedly using illegal emissions bypass

VW is in hot water. The company needs to recall 500,000 vehicles because it supposedly bypassed emissions test using software called 'defeat device' which bypasses emissions tests. If proven guilty, VW could face massive fines.

Involved in this recall are  the 2009-2015 Volkswagen Golf, Jetta and Beetle, the 2014-2015 Volkswagen Passat and the 2009-2015 Audi A3. The 'defeat device' detects when the car is undergoing emissions testing and turn on all of the car's emissions control systems then. In normal driving, the systems would turn off, causing 40 times larger nitrogen oxide emissions, according to the E.P.A.

Why did VW resort to this, likely to increase performance and fuel efficiency since emissions control do make performance more sluggish. The recall is in effect in the US.