The 14-year-old suspected killer of Barnard College freshman Tessa Majors jumped out of a car while on his way to meet with New York City cops yesterday, sparking a manhunt in Harlem.

Cops fanned out across 125th Street — with particular focus between Frederick Douglass and Adam Clayton Powell Jr. boulevards — to look for the alleged teenage killer.

The middle-schooler and an adult were headed to meet with police yesterday, when the kid bolted out of the car.

The adult notified authorities, who took to the area to track the teen.

The fugitive is among three suspects cops have identified in the fatal stabbing of Majors, 18, on December 11 in Morningside Park.

Majors, a musician and aspiring journalist, was allegedly grabbed, put into a chokehold and repeatedly stabbed by the trio in what cops have called a botched mugging.

One suspect, a 13-year-old, was arrested last week and charged in family court with felony murder.

He has purportedly admitted to taking part in the robbery, but denied he stabbed Majors.

The third suspect, 14, was also arrested on Friday, but released on Saturday as cops continued to build their case.

The suspect currently on the run is believed to be the one who wielded the knife.