Volkswagen chief executive Matthias Mueller has said the company has now found technical solutions for 90% of the European vehicles affected by its emissions scandal.
It means the recall of all affected models throughout Europe, including the UK, can start to build some pace and an official recall is expected to be issued at the end of this month.
Dealers are expected to be offering software updates for 2.0-litre diesel engines. However, it is believed some models will recquire more complex solutions fincluding fuel injector replacements.
Mueller said VW's internal enquiry into the scandal is ongoing and due to its complexity, would take months to complete. An update on progress is expected in the middle of December this year.
VW Group UK has said its dealer networks will begin modifications from January and has a target to complete them before the end of 2016.
Willi said: “I apologise to our customers for it taking so long. It’s better to be thorough and get it absolutely right.”
Owners who are inconvenienced by being without their car during the recall process would receive a loan car.