Officials announced in August that the machines that see through clothing would be in place at Newark Liberty International, John F.
Kennedy International and LaGuardia airports by September.
The Transportation Security Administration told The Star-Ledger of Newark the installation is complex and the scanners would arrive "in the coming weeks."
Passengers who prefer not to be scanned can choose to be patted down and pass through a metal detector.
TSA spokesman Ann Davis says passengers are no less safe. She says the scanners are designed to be faster and less physically intrusive than metal detectors and pat-downs.
The TSA has installed 259 scanners at 59 airports nationwide.