Vance has new rival

A FORMER Brooklyn prosecutor is launching a long-shot bid to unseat Cy Vance Jr. as Manhattan district attorney.

Civil rights attorney Marc Fliedner announced a lastminute write-in run on Wednesday amid the uproar over the 2005 failure of Vance’s office to prosecute movie mogul Harvey Weinstein on sexual assault charges.

Fliedner, 55, lost a crowded Democratic primary for Brooklyn DA against incumbent Eric Gonzalez last month.

Vance, 63, is running for his third term as DA.