The EU's scientific institute in Italy has found that a Volkswagen (VW) diesel car became dirtier after the software was updated to no longer detect when it was being tested, according to a source who spoke on condition of anonymity.
The Joint Research Centre, which has an emissions test laboratory in Ispra, Italy, has carried out a before-and-after test on the Volkswagen Tiguan – one of the models the German company had equipped with illegal software to fool emissions tests.
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