More than three in four drivers want to see the Government bring in new tests on vehicle emissions and fuel economy in light of the Volkswagen scandal, a survey has found.
The poll, carried out by Which?, also found that 79% of people expect to see more manufacturers drawn into the issue of cheating on emissions tests.
The German car manufacturer has said it will recall 8.5 million vehicles in Europe following the discovery of so-called defeat device software which was used to cheat environmental tests.
Close to 1.2 million vehicles are affected in the UK with recalls due to start in the first quarter of next year for remedial work.
More than 1,500 car owners were questioned for the survey, which also found that fewer than one in five people (19%) think the Government has a clear action plan to deal with the fallout from the scandal.
Which? executive director Richard Lloyd, said: "This scandal has rocked the motoring industry and public trust has been badly shaken. The public are rightly demanding answers from the Government.
"We're calling on the Government to quickly put in place an independent investigation and to ensure that consumers are not left out of pocket."
A previous survey by Which? of over 2,000 motorists who own a VW diesel manufactured between 2008-15 showed that 90% think they should get compensation.
Transport Secretary Patrick McLoughlin said earlier this month: "I have been pressing for action at an EU-level to improve emissions tests and will continue to do so. I have also called for a Europe-wide investigation into the use of defeat devices, in parallel to the work we are doing in the UK."