The Birmingham MP representing Longbridge has offered to tell all about his private conversations with Phoenix managers over the past five years.
Richard Burden, the Labour MP for Northfield, has quit the House of Commons Trade and Industry Committee, which is to conduct an inquiry into the collapse of MG Rover.
He has offered to give evidence about "the questions I asked and the answers I got" in meetings with the directors of Phoenix Venture Holdings, MG Rover's parent company.
Mr Burden said: "I would be very happy to give evidence to the committee.
"It depends what they choose to ask me. But I would be very happy to give my views on how the Phoenix Consortium came into being.
"Also, about the questions I have been asking Phoenix over the past five years, what happened to the deal with SAIC at the end, and what happened to the strategic alliance with China Brilliance, and some of the other things."
The Birmingham Post has also learned that the committee is likely to delay an inquiry until administrators have completed the task of trying to find a buyer for what remains of the business.
There is agreement at Westminster that an inquiry is needed, but there is also concern that nothing is done which would make it harder for administrators PricewaterhouseCoopers to save jobs.
A separate Department of Trade and Industry inquiry, ordered by Trade Secretary Alan Johnson, has already been announced.
In 2002 a planned link-up with China Brilliance Industrial Holdings, which could have secured MG Rover's future, collapsed.
Mr Burden said: "These are all areas I have been asking the company questions about over the past five years.
"If the questions I asked and the answers I got would be helpful, I would be very happy to give evidence."
Mr Burden was a member of the Trade and Industry Committee last year when it called for Phoenix to be more transparent about its business dealings.
But since Rover's collapse he has claimed that the assurances given by Phoenix chairman John Towers and his colleagues are "difficult to reconcile" with the facts that have emerged.
Critics had attacked the firm's directors for awarding themselves a #12.9 million pension fund, and accused them of asset-stripping by separating the loss-making car production business from other, more profitable parts of the firm.
He added: "I made a decision that, given the fact it is likely that the Trade and Industry Committee was going to have an inquiry on
MG Rover, I would stand aside from that.
"As the constituency MP, someone who has a close personal interest in Rover and has been deeply involved, I was not the most appropriate person to be part of the inquiry." In principle the Trade and Industry Committee, which is to hold a private meeting today, has the legal right to summon witnesses.