Mitsubishi Motors has admitted it has lied about fuel economy data for some of its models since 1991.
The shocking admission comes following an internal investigation by the carmaker after being outed by Nissan last week for manipulating figures for 600,000 micro cars sold in Japan.
President Tetsuro Aikawa told reporters on Tuesday that the probe was ongoing, though he could not confirm which models are affected and on what scale.
The revelations have further dented the reputation of the carmaking industry, which has already been called into question by the VW diesel emissions scandal and its aftermath.
It was retests conducted by Nissan on its Dayz and Dayz Roox vehicles that eventually exposed Mitsubishi's wrong doing.
Mitsubishi admits cheating some fuel economy figures for 25 YEARS | Daily Mail Online