Hyundai Sonata سمارت 2018 Used Automatic Gasoline mileage: 285 KM Sonata for sale 2018 There is a sound in the engine. I took it to several workshops. Some say it's in the engine, some say it's the tensioner, pistons, and belt. Some say it's the radiator. Some say it's the compressor's brake pads, and I don't know. The inspection has expired. The registration has expired.