An NYPD car involved in a Queens fender bender apparently had its brake line cut by an unknown saboteur, police sources said.

Cops learned about the cut line Tuesday, nearly two weeks after the Oct. 7 crash.

The driver believed something was wrong with the brakes, and the NYPD took the car out of service. When an NYPD mechanic put the car on a lift Tuesday, cops found a “clean cut to the brake line,” a police source said.