FRANFURT, Germany — Auto giant Volkswagen revealed Tuesday that 11 million diesel cars worldwide are equipped with devices that can cheat pollution tests, a dramatic expansion of a scandal that immediately sent its shares plummeting by another 20%.

Authorities from France to South Korea to the United States announced investigations and threatened legal action, prompting Volkswagen to announce that it was setting aside 6.5 billion euros ($7.3 billion) in provisions for the third quarter to cover the potential costs of the scandal. 

VW shares, which dived 17% on Monday, plunged by another 23$ to a low of 101.30 euros during trade on the Frankfurt stock exchange as the automaker’s new revelations, including a warning that it will have to lower its profit outlook, sent investors fleeing.

“Further internal investigations have shown that the software concerned is also installed in other diesel vehicles,” VW said in a statement. ”Anomalies have shown up in around 11 million cars worldwide that are equipped with a specific engine type. … In order to cover the necessary service and other measures to win back customer confidence, VW plans to set aside 6.5 billion euros in provisions in the third quarter. The group’s earnings targets for 2015 will be adjusted accordingly.”  

The spiraling scandal has led to France calling for a Europe-wide probe into the revelations, South Korea summoning Volkswagen officials, and the U.S. Justice Department reportedly launching a criminal investigation. CEO Martin Winterkorn could reportedly be relieved of his duties by the company’s supervisory board in the wake of the pollution cheating scandal, the regional daily Tagesspiegel reported Tuesday.

The scandal went public Friday when U.S. regulators ordered Volkswagen, the world’s largest automaker by sales, to fix the defect and said they were launching a probe. The German firm halted all diesel vehicle sales in the United States during the investigation, which could lead to fines of more than $18 billion.

The shockwave immediately hit stock markets, with VW shedding more than a quarter of its value — or more than 20 billion euros — since last week.

Other automobile stocks were also dragged lower, with Daimler shares down 7.03% and BMW shedding 7.17% on Tuesday. 

Candid in America, Possible Probe in Europe

Volkswagen America CEO Michael Horn used unusually candid language to apologize and admit wrongdoing after the German car giant was caught cheating in U.S. pollution measuring tests.

“Our company was dishonest, with the EPA and the California Air Resources board, and with all of you and — in my German words — we have totally screwed up,” Horn said at an event in New York late Monday, according to video posted by CNBC.

Horn pledged to “make things right with the government, the public, our customers, our employees and also very important, our dealers.”

French finance minister Michel Sapin requested a Europe-wide probe on Tuesday, telling French radio that it seemed necessary to check cars manufactured by other European automakers in order to reassure the public.

“This is not a minor subject, it’s not about speed or the quality of leather,” Sapin told Europe 1 radio station. “What we are dealing with is making sure people avoid being poisoned by pollution.”

South Korean officials summoned VW representatives for explanations on Tuesday. “We will start conducting tests no later than next month,” a senior official at the environment ministry said.

In addition to the environmental probe already under way, the U.S. Department of Justice has launched a criminal investigation, U.S. officials told the Bloomberg news agency. The Justice Department and Volkswagen declined to comment on the report.

According to the U.S. authorities, VW has admitted that it had equipped about 482,000 cars in the United States with sophisticated software that covertly turns off pollution controls when the car is being driven and turns them on only when it detects that the vehicle is undergoing an emissions test.

With the so-called “defeat device” deactivated, the car can spew pollutant gases into the air, including nitrogen oxide in amounts as much as 40 times higher than emissions standards, said the US Environmental Protection Agency, which announced the allegations Friday along with California authorities.

A Blow to the Reputation 

“Using a defeat device in cars to evade clean air standards is illegal, and a threat to public health,” said Cynthia Giles, enforcement officer at the EPA.

In Germany, the government has already launched an investigation into whether Volkswagen or other car makers are doing anything similar in Germany or Europe.

The German daily Frankfurter Allgemeine Zeitung reported that the national supervisory authorities had alerted VW to discrepancies in the emissions data in May 2014 and some cars were even recalled.

Transport minister Alexander Dobrindt told the Bild daily that he had asked Germany’s Federal Motor Transport Authority “to immediately have specific and extensive tests conducted on all Volkswagen diesel models by independent experts.”

Beyond the potential fines and lawsuits, the company faces a potentially crippling blow to its reputation.

So far the scandal has been restricted to Volkswagen. But the EPA said Monday that it will screen for defeat devices in other manufacturers’ diesel vehicles now on the road, though it declined to identify the automakers whose vehicles will be tested.

Environment protection groups, particularly in Germany, suspect other car makers might be using similar technology. 

Industry experts say VW chief executive Martin Winterkorn’s job is on the line. German media reports have said the car maker’s supervisory board will meet on Wednesday and summon Winterkorn. VW was not immediately available to confirm the information. 

By Simon Morgan

Copyright Agence France-Presse, 2015