The former Roten forward believes the Bundesliga leaders have the potential to beat another of his old clubs, Juventus
The Bavarians take on another the veteran's old teams, Juventus, in the quarter-finals, and though the forward thinks the Bianconeri will be concentrating fully on the match, he feels Jupp Heynckes' men could reach the final in May.
"It will be nice to watch the game. Juve will have to be very careful because Bayern can go all the way," he told Tuttosport.
"They will be two tough games because we are talking about two big clubs. Juve will have the advantage of being able to concentrate on the Champions League after creating a big gap at the top of Serie A.
"The Bianconeri and the Bavarians are two very different teams. Bayern have a lot of quality but sometimes lose incredible matches."
The 35-year-old spent three years in Munich and one in Turin, and he conceded that he would not be supporting either side in the encounter due to have still having friends at both clubs.
"I have many friends from both sides, so I'm just going to be watching to see who is the strongest. In my opinion, Bayern really are a team that can go all the way," he added.