Markko Martin, whose co-driver Michael Park died when their car hit a tree in Wales last year, says the World Rally Championship has lost its appeal.
Markko Martin is disillusioned with World Rally
The Estonian, who is without a drive in 2006, urged the International Automobile Federation to take action.
"It is just not the same championship that it used to be, so I can't push myself to make a huge effort to get in there and make it happen," said Martin.
"I don't see much future for myself in the championship."
Martin threatened to quit World Rally following Park's tragic death.
And Ford and Subaru are the only full works teams left involved after the withdrawal of Peugeot.
"You need the manufacturers in it to make it exciting because they will do everything, and if that doesn't happen then I don't know what the future is," he said.
"I think the FIA should get their act together and do something quickly, otherwise it is not the bottom where we are at the moment."
The season starts in Monte Carlo next week.