A Brooklyn woman whose idling car was allegedly swiped off the street Thursday lied to cops that her 6-year-old nephew was inside — so they would try to find it faster, police and sources said.

The 22-year-old woman told cops she’d left her 2008 Chrysler Pacifica running while she went into a store on Farragut Road near Albany Ave in East Flatbush at about 11:50 p.m., authorities said.

She told authorities that she returned and discovered her car missing. She then called 911 and claimed to the operator that her 6-year-old nephew was inside, police said. But when responding cops found the vehicle 10 minutes later just a few blocks away, there was no child, authorities said.

The woman fabricated the story in an attempt to rush officers to the scene, officials said. Police later discovered the woman’s nephew had been home the whole time, sources said.

She was taken into custody shortly after and is expected to be charged with filing a false police report, the sources said.