The former Germany international is of the opinion that the shot-stopper is sometimes guilty of switching off at inopportune times but still believes he is destined for greatness
Kahn has been impressed with Neuer's performances since arriving from Gelsenkirchen last summer but admits that he is somewhat concerned by the 25-year-old's propensity for switching off mentally.
"He's finding out how difficult it can be if you only have one or two saves to make in an entire match," the former Germany captain told Fifa.com.
"You have to be 100 per cent alert and totally focused the whole time. But Neuer is a goalkeeper who could come to characterise an era at Bayern."
Kahn of course, won a Champions League with Bayern in 2001 and he is of the opinion that the current side is capable of emulating that success, though he acknowledges that even with the final being staged at the Allianz Arena, winning Europe's premier club competition will be anything but straightforward.
"Obviously, it's an additional motivating factor [that the tournament decider is in Munich]," he mused. "Bayern are always favourites to win the Bundesliga, and they have quality.
"But to win the Champions League you need tremendous passion, extraordinary desire, and a bit of luck too."
Given his standing with the club, Kahn is often asked about returning to Bayern in some sort of coaching capacity.
However, the 42-year-old insists that it is not something that he is currently considering.
"I have so many other activities at the moment, so I'm not looking for a way back into football," he explained.
"There are other things and challenges away from the game. But obviously, I remain an interested observer of the club."
Kahn, who was capped 86 times by his country, spent 14 years with Bayern before retiring from the game in 2008.
Want to be at the Euro 2012 opener? Who doesn't? With Sharp FanLabs you can win free tickets to the opening event of 2012's biggest tournament. Click here to take part!