The Environment Ministry said Sunday that Kia is recalling over 197,000 cars due to defective PCV valves.
Those subject to the recall include four models produced between Jan. 17, 2011 and July 16, 2012 -- 32,047 gasoline versions of the Ray 1.0, and 164,903 units of the Ray 1.0 Bi-fuel LPI, Morning 1.0 gasoline and Morning 1.0 Bi-fuel LPI.
Their PCV valves were made from a kind of plastic that can be easily worn away. As such, engine oil is burned together with fuel, causing white smoke containing fine particles to come out of the exhaust pipes.
The Ray 1.0 gasoline model, in particular, showed a defective rate of 13.1 percent with 345 cases of faulty exhaust pipe parts, leading to a mandatory recall.
Kia also decided to issue a voluntary recall for the other three models equipped with the same component. For more information, call the automaker's customer center at 080-200-2000.