Do you drive an Audi car?

This piece of information should interest you.

German luxury carmaker Audi, a Volkswagen subsidiary, has issued a voluntary recall of up to 850,000 diesel vehicles Friday, saying it would help reduce engine emissions.

"Audi aims to maintain the future viability of diesel engines for its customers and to make a contribution towards improving air quality," the Bavaria-based manufacturer said in a statement.

Vehicles with affected engines would receive a free software upgrade that "will further improve their emissions in real driving conditions beyond the current legal requirements," Audi added.

The recall affects cars fitted with six- and eight-cylinder diesel motors meeting the Euro 5 and Euro 6 emissions criteria, Audi said, including some from parent Volkswagen and sister firm Porsche that are fitted with Audi engines.

It had developed the offer "in close cooperation" with Germany's Federal Motor Transport Authority or KBA, it added.

Audi's recall comes days after Mercedes-Benz and Smart maker Daimler issued a voluntary recall for more than three million diesel vehicles in Europe.