The steering committee comprises six of the most influential members of VW's 20-strong supervisory board, including the head of the general works committee, the head of the mighty IG Metall metalworkers' union and the head of the regional state of Lower Saxony where the carmaker is based.
Piech is the grandson of the inventor of the iconic Beetle, the model on which VW's fortune was built, and was himself VW's chief executive between 1993 and 2002, before becoming its supervisory board chief.
He is also one of the representatives of the Porsche family, whose holding company Porsche SE holds nearly 51% of VW.
It was Piech who installed Winterkorn as chief executive in 2007.
But he appears to have become irked by his former protege's difficulties in making substantial inroads into the U.S. market, VW's over-dependence on the Chinese market and the waning attractiveness of its core Volkswagen brand.
Nonetheless, few people appear to share Piech's ire -- after all, the carmaker chalked up nearly 11 billion euros in net profit last year and its share price has more than trebled in five years.
The weekly newspaper Die Zeit said Piech's "authoritarian style" was becoming anachronistic.
"The big global players who want to succeed in the 21st century are run differently," it said in an editorial.
The decision to keep Winterkorn in office "could weaken Piech's position as supervisory board chief," said DZ Bank analyst Michael Punzet. Piech's own contract runs until 2017.
By Simon Morgan
Copyright Agence France-Presse, 2015