Martin Winterkorn, the VW CEO who steared Europe's largest carmaker to crisis, has since resigned, and upstarts in the corporation are calling for change.
Four other carmakers were not accused of installing any software to cheat on the emissions tests, but their diesels spew more pollution than shown in tests.
Meanwhile, Volkswagen's Australia unit said it will conduct a voluntary recall of nearly 100,000 vehicles equipped with emissions-rigging software.
The Texas city has become the latest local governmental entity to sue the German auto-maker over software trickery that faked road-test emissions for millions of diesel cars.
Volkswagen's U.S. boss admitted Thursday that most of the emissions-cheating cars need hardware repairs, not just software patches.
Michael Horn, who said he was made aware of “possible emissions non-compliance” in early 2014, will testify before a Congressional committee Thursday.
The talks comes amid the company's disclosure that over 90,000 vehicles sold in Australia are equipped with software to cheat on emissions tests.
Porsche chose Apple CarPlay for its vehicle entertainment system, but sibling brand Volkswagen will support Android Auto as well.
At a staff meeting at company headquarters Tuesday, Volkswagen CEO Matthias Mueller hinted at job cuts stemming from the massive emissions scandal engulfing the German automaker.
"West Virginia consumers responded to Volkswagen’s advertising by purchasing TDI clean diesel models, expecting that their vehicles would be environmentally friendly."
The German automaker reportedly has until Wednesday to fix some 2.8 million diesel vehicles in its home market equipped with emissions-cheating software.
"I believe the reputation of the German economy and the trust in the German economy has not been shaken by this to the extent that we are no longer considered a good business location," the chancellor says.
Despite Volkswagen’s lack of communication about when car fixes will come, dealers from Ohio to Florida say they aren’t sweating a significant loss of sales.
The death toll is probably much higher in Europe, where more of the German automaker’s cars were sold.
The emissions tests reportedly would begin in about 10 days, with results set to be published by next May.
Hans Dieter Poetsch also indicated he believes Volkswagen could overcome the crisis.
European policies -- and the Chinese jewelry market -- have contributed to the dip in demand for the precious metal and the corresponding drop in its price.
The U.S. agency that publicized Volkswagen's cheating on emissions tests will check diesel vehicles made by other manufacturers for the possibility of similar frauds.
Drew Mizak, a Connecticut schoolteacher, wants Volkswagen to recall or replace the cars he bought under the impression they environmentally sound.
In September, scandal-plagued German automaker Volkswagen missed out on one of the best auto sales months in the U.S. in more than a decade.
German prosecutors said Thursday that an earlier statement about Martin Winterkorn being under criminal investigation was "formulated incorrectly."
Sources told Reuters there were worries that a downgrade could inflict higher borrowing costs on the company.