 In 1999, three unpowered cars (two from train 1-42 and one from train 1-43) were rebuilt into driving cars by Daewoo Heavy Industries.They were renumbered to cars 1082, 1182, and 1087 (former trailer car 1842, 1942, and 1943 respectively), and were linked with 1st generation cars.Because no car numbered 1187 was built, car 1087 ran with 3rd generation car 1186 and was retired in 2001.