An off-duty NYPD detective was charged with driving while intoxicated after he allegedly refused to take a breath test, authorities said.

John Matzen, 38, allegedly hit two parked cars while driving in Brooklyn early Saturday and wouldn’t take the test when responding cops asked him to, police said.

Responding cops said they found Matzen behind the wheel of his vehicle near Avenue D and Rockaway Avenue in Canarsie, with the ignition on and “exhibiting signs of intoxication,” a police spokeswoman said.