The company is under pressure to act decisively, with German Chancellor Angela Merkel urging it to quickly restore confidence in a business held up for generations as a paragon of German engineering prowess.
"There will be further personnel consequences in the next days and we are calling for those consequences," Volkswagen board member Olaf Lies told the Bavarian broadcasting network.
The research and development chiefs of Audi and Porsche Cheap Air Max Deluxe , Ulrich Hackenberg and Wolfgang Hatz, will be removed by the supervisory board, as will Volkswagen's top executive in the United States, Michael Horn, the senior source told Reuters.
Hackenberg and Hatz had both held senior posts at VW in development Cheap Air Max Classic BW , including of engines, before they switched to Audi and Porsche. They are among VW's highest-ranking engineers.
Horn acknowledged this week that the company had "totally screwed up" by deceiving US regulators about how much its diesel cars pollute.
Regulators in Europe and Asia had already said they would investigate Volkswagen and other carmakers, and Volkswagen also faces criminal inquiries and lawsuits from cheated customers.
Italian prosecutors have opened a preliminary probe, a judicial source said, and the European Commission urged all member states on Thursday to investigate how many cars use the so-called "defeat devices" employed by Volkswagen to rig tests.
The scandal has sent shockwaves through the car market Cheap Air Max Axis , with manufacturers fearing a drop in demand for diesel cars and tougher regulations and customers worrying about the performance and re-sale value of their cars.
Dobrindt said Europe would agree new emissions tests in coming months that should take place on roads, rather than in laboratories, and that random checks would be made on all manufacturers.
So far, no other carmaker has been found to have used "defeat devices." German rival BMW said on Thursday it had not manipulated emissions tests, after a magazine reported some of its diesel cars were found to exceed emissions standards.
DIESEL CAR DRIVERS WORRIED
Friday's board meeting had originally been due to extend the contract of Winterkorn and set out a new management structure.
Though Winterkorn oversaw a doubling in sales and a near tripling in profit in his eight year rein Cheap Air Max 98 , he faced criticism for the company's underperformance in the United States and for a micro-managing style that critics say delayed model launches and hampered its ability to adapt to local markets.
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