DAB+ will be available on 5 Series and 7 Series from May 2011, and the new 6 Series upon launch later in the year, the company said.
The optional extra will cost AU$750 on all 7 Series, and AU$900 on 5 Series Touring and Sedan vehicles.
"Today's announcement by BMW to offer DAB+ digital radio as an option in a number of models is a great step forward for drivers wanting to access digital radio in cars. Our research shows 33 per cent of commercial radio listening is in the car and with leading brands like BMW making digital radio available in their vehicles, the technology can only move from strength to strength," Joan Warner, chief executive officer of Commercial Radio Australia said.
Digital radio is currently available in Sydney, Melbourne, Adelaide, Brisbane and Perth with test broadcasts occurring in Canberra and Darwin.