Volkswagen will repair up to 11 million vehicles and overhaul its namesake brand following the scandal over its rigging of emissions tests.
New chief executive Matthias Mueller said the German carmaker would tell customers in the coming days they would need to have diesel vehicles with illegal software refitted, Reuters reported.
Some analysts said the move could cost more than US$6.5 billion.
In Washington, US lawmakers asked the automaker to turn over documents related to the scandal, including records concerning the development of a software program intended to defeat regulatory emissions tests.
In separate letters, leading Republicans and Democrats on the House Energy and Commerce Committee requested information from both Volkswagen and the US Environmental Protection Agency as part of an investigation into the controversy.
Europe’s biggest carmaker has admitted cheating in diesel emissions tests in the United States and Germany’s transport minister says it also manipulated them in Europe, where Volkswagen sells about 40 percent of its vehicles.
The company is under huge pressure to address a crisis that has wiped more than a third off its market value, sent shock waves through the global car market and could harm Germany’s economy.
“We are facing a long trudge and a lot of hard work,” Mueller told a closed-door gathering of about 1,000 top managers at Volkswagen’s Wolfsburg headquarters late on Monday.
“We will only be able to make progress in steps and there will be setbacks,” he said, according to a text seen by Reuters.
Volkswagen did not say how the planned refit would make cars with the “cheat” software comply with regulations, or how this might affect vehicles’ mileage or efficiency, which are important considerations for customers.
It said it would submit the details to Germany’s KBA watchdog in October.
Manipulating emissions results allowed Volkswagen to keep down engine costs in a “clean diesel” strategy that was popular in Europe and at the heart of a drive to improve US results.
Mueller was appointed CEO on Friday to replace Martin Winterkorn. German prosecutors are investigating Winterkorn over allegations of fraud.
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