The Metropolitan Opera’s accused sex-harassing conductor , James Levine, appeared frail and refused to say a word as he left his Central Park West apartment in his motorized wheelchair Tuesday.

The under-fire maestro, 74, was then whisked off in a Toyota van.

“Back off! Back off! Innocent until proven guilty,’’ the female van driver angrily told The Post as the wild-haired Levine, in a red blazer, was assisted into the van by a lift. Two men emerged from Levine’s building with him and used massive black umbrellas to block him from photographers.

Meanwhile, the Met announced that French conductor Emmanuel Villaume will replace Levine for its New Year’s Eve production of “Tosca’’ and most of its January performances.

Levine was forced to step aside amid allegations that he sexually harassed or abused several teenage boys.