A crook posing as a subtenant swiped a South Korean music prodigy’s cherished $140,000 Yamaha grand piano from his swanky Trump Place pad, a Manhattan Supreme Court lawsuit charges.

Classical pianist Dong-Hyek Lim, 28, rented to a “Byungyung Kim” in December 2012 only to find the piano gone when he returned in January, the suit says.

Police and Lim tracked the piano to Amadeus Piano in Suffolk County. The company’s president said he wants the court to determine its true owner.

julia.marsh@nypost.com