VW has announced it will recall 8.5 million vehicles in Europe as a result of the diesel emissions scandal.
The move was prompted by Germany’s automotive watchdog (KBA), which earlier told Volkawagen to recall 2.4 million domestic cars.
German media reports suggest the KBA earlier rejected VW’s proposals that car owners could voluntarily bring their cars in for repair.
Meanwhile, Italian police have raided VW offices in Verona and Lamborghini offices in Bologna.
Reports suggest Italian prosecutors are investigating alleged commercial fraud.
Separately, the man tipped to become VW’s North America boss has resigned.
The automaker gave no details of the recall and said it would contact individual customers directly.
VW added that it was working on solutions to fix the recalled cars “at full speed”.
Last month, authorities in the US discovered some VW diesel cars had been fitted with a device to cheat emissions tests. VW subsequently admitted that up to 11 million cars worldwide could have the device fitted.
VW has launched a thorough investigation into the scandal, but new chairman Hans Dieter Poetsch has warned that answers would take “some time”.
The company has set aside €6.5 billion ($7.4 billion) to cover the costs of the scandal, but some experts believe the final bill could be much higher.
VW shares recovered slightly last week but are still down almost 20% since the scandal broke in mid-September.