The top cop who was brought in by Police Commissioner Bill Bratton to clean up the scandal-riddled NYPD License Division just two weeks ago has abruptly quit, police sources said Tuesday.

NYPD Inspector Terrence Moore — a 31-year-old veteran of the force who worked with the department’s Internal Affairs Bureau — quietly put in his retirement papers Friday and was seen packing up his belongings in his office Sunday, sources said.

Moore left for “personal reasons,’’ sources said.

He was cleared for retirement and was not a target of the federal probe into the division, a source said.

Moore was installed to shake up the gun-licensing division after a Brooklyn businessman was charged with slipping cash to cops there in exchange for pistol permits for his clients.

Two cops — Sgt. David Villaneuva and Officer Richard Ochetal, both of whom are assigned to the division — were recently put on desk duty amid the probe.

The NYPD is currently examining every gun permit linked to the businessman, Shay Lichtenstein, and has demanded the return of dozens of permits until the end of the inquiry.

Moore’s replacement has not yet been announced.