Audi said 2.1 million cars worldwide were fitted with the software that allowed parent Volkswagen to cheat U.S. emission tests.
Some 1.42 million Audi vehicles with so-called EU5 engines are affected in Western Europe, with 577,000 in Germany and almost 13,000 in the United States, a spokesman for Ingolstadt-based Audi said on Monday.
Affected model lines include the A1, A3, A4, A5, A6, TT, Q3 and Q5, the spokesman said.
VW said last week around 11 million cars of its group brands worldwide are affected by the diesel emissions scandal.
Volkswagen is under heavy pressure to show it can get to grips with the biggest business-related scandal in its 78-year history.
The board will dismiss the head of its US business, the top engineers of its luxury Audi and Porsche brands and the head of brand development at its VW division, sources said, aiming to show it is acting decisively to end the crisis.
Reuters