Four alleged high-tech thieves were charged yesterday with stealing at least $1.5 million through a scheme that involved installing illegal electronic equipment on four Manhattan bank machines.

Members of the gang replaced the key pads on ATMs at Chase branches in Midtown, Chelsea and across from the United Nations in March and April of last year, court papers claim.

The “skimming” devices allowed the suspects — who are from Romania and Austria — to remotely obtain customers’ PINs and loot their accounts, according to the Manhattan federal court indictment.

The suspects did not confine their illegal activities to New York, prosecutors said, accusing them of also targeting Chase and Citibank branches in Miami and Chicago.

If convicted, the suspects face up to 60 years in prison.