Former champions Mitsubishi have become the latest team to pull out of the World Rally Championship.
Rovanpera takes part in Rally Australia in November
Mitsubishi, who may return to the competition in 2008, are the fourth team to quit the 2006 season after Citroen, Peugeot and Skoda.
World rallying now has only two factory teams left for 2006, although Skoda and Citroen will support private teams.
Mitsubishi claimed four straight drivers' titles in the late 1990s and won the manufacturers' title in 1998.
This year they finished fifth in the standings with 76 points.
Despite the withdrawal, Mitsubishi will continue to compete in the Dakar Rally.
Mitsubishi have had financial concerns in recent years and have criticised world governing body, the FIA, in response to doubts over the future shape of the championship.
"Mitsubishi Motors Corporation has made a solid start toward revitalising its business operations," said a company statement.
"However, to strengthen and build upon this base, MMC realizes that it must focus management resources on the continued promotion of the revitalisation plan.
"Mitsubishi Motors hopes to return to the WRC Championship series from 2008, after the completion of the revitalisation plan, which covers fiscal 2005 to 2007."