Bayern and Wolfsburg are joint second on 48 points, a point behind leaders Hertha Berlin with nine matches left and a defeat for either would see them drift off at least three points.
Wolfsburg, with seven consecutive wins, have the league's most feared home record, dropping only two out of a possible 36 points from 12 matches.
Toni's return from a four-week absence with a heel injury is welcome news for Bayern who had been short of fit strikers after Miroslav Klose injured his ankle and was ruled out for more than a month, leaving volatile Lukas Podolski as the only option.
"Luca is hungry. He wants to get stuck in there," said Bayern coach Juergen Klinsmann on Wednesday after the Italian scored a hat-trick in training.
"He is fully fit and he has the confidence that the heel is 100 percent well. That is important mentally," he told club website.
'OLD CAT'
"Felix is an old cat, a real competitor," said Bayern manager Uli Hoeness. "He will stay in the shadows and play down his hopes.
"If we win then that would almost be the title, even a draw leaves all our options open."
But injured captain Arne Friedrich is still doubtful for Hertha's defence.
