The president of Mitsubishi Motors is to step down over the Japanese carmaker’s test-fixing scandal. Tetsuro Aikawa, who became the company’s president and chief operating officer in June 2014, has denied any personal involvement in the scandal – which involved 625,000 cars over 25 years – but has apologised to customers and shareholders. His resignation is expected to take effect on 24 June, once it is approved by shareholders. A successor is yet to be announced.The scandal widened on Wednesday, as fellow Japanese carmaker Suzuki Motor Corporation said it had found discrepancies in its fuel economy testing affecting 16 models, or 2.1m vehicles. The company said proper testing had since shown that the mileage data did not need amending.