MPs have demanded a government-backed inquiry into the collapse of MG Rover is forced to publish its findings.
The independent investigation began in June 2005 but has so far not reported any of its conclusions. In January it was revealed it had cost £11.8m.
The Birmingham car maker went bust in April 2005 with the loss of 6,000 jobs.
The business and enterprise committee of MPs has called for the findings to be made public, but the government has refused to set inspectors a deadline.
The government called in fraud and insolvency specialists to help the official inquiry into the failure of the firm, which was bought by Nanjing Automobile Corporation in July 2005.
Mid-Worcestershire Conservative MP Peter Luff, who chairs the business and enterprise committee, said the inquiry had taken long enough.
He said: “The inquiry is simply taking too long. People lost their jobs and the community was destroyed by what happened at Longbridge and MG Rover.
“I think justice delayed is always justice denied. People want to know the answers and its taking an awful long time for them to get them.”
Companies Act inquiries can often take years to complete, but Mr Luff said he thought the MG Rover inquiry should be made a priority.
He said MPs also wanted to ensure it was being carried out efficiently.
Figures released under the Freedom of Information Act in January revealed that the inquiry had cost almost £12m including £95,094 spent on hotels and £29,279 on food and other expenses.
The government said it would not set inspectors a deadline for their findings and said the inquiry was intent on completing the investigation “as quickly as possible”.
Former MG Rover worker Andrew Cartwright said he was more concerned that the inquiry got to the bottom of the issue than reporting its findings quickly.
He said: “What those directors have done to this company perhaps it does need a long inquiry, perhaps they’ve got to dig really deep.
“But I just hope that they come out with the results.”
Source: BBC News