Upper Hutt mayor Wayne Guppy's car was stolen last week as he squeezed in an afternoon workout.
Guppy was at a gym in Upper Hutt on Thursday when the thief broke the padlock on his gym locker and swiped his keys, wallet, and cellphone.
He said he didn't know whether the crime was targeted at him, or if it was "just a random act of kindness".
His unmarked Holden Commodore valued at $46,000 was taken from the parking lot, according to court documents.
"The police did a great job, they got it back on Thursday night," Guppy said.