The Japanese government has ordered the suspension of sales of eight additional Mitsubishi Motors models in the country due to inflated fuel-efficiency claims, according to local reports.

Earlier this year, the company had been involved in a similar scandal after it admitted to systematically falsifying fuel-efficiency claims of its EK mini-vehicles, which were also supplied to Nissan on an OEM basis.

Sales of both Mitsubishi and Nissan mini-cars have fallen sharply this year as a result of the scandal, by 37% and 41% respectively in the first seven months of the year. This was partly because sales were suspended while new registration documents were processed by Ministry of Transport.

At the time Mitsubishi said there were no other models involved but, after a series of tests, Japan's Transport Ministry found other Mitsubishi models had enhanced fuel-consumption data claims.

Among the additional models are the Pajero SUV, and even the i-MiEV electric car, with overall fuel-efficiency overstated by as much as 8.8% and by more than 4% on average.

A Mitsubishi spokesman was quoted as saying that, on these models, the best mileage data was used rather than the average mileage data. Mitsubishi has already resubmitted documents with the corrected mileage data to the Ministry of Transport and expects to get the new certificates when the re-registration procedure is completed.

The company said it would compensate the owners of the 76,000 vehicles involved each with cash payments of between JPY30,000-100,000 (US$291-971), which is expected to cost the company some JPY7bn.