| Korail Commuter Diesel Car | |
| Service: | 1996–2023 |
| Manufacturer: | Daewoo Heavy Industries |
| Yearconstruction: | 1996–1999 |
| Yearservice: | 1999 |
| Numberbuilt: | 131 |
| Numberservice: | 10 |
| Capacity: | 79–89 seats |
| Operator: | Korail |
| Trainlength: | 209000NaN0 |
| Width: | 32000NaN0 |
| Height: | 42000NaN0 |
| Wheeldiameter: | 8600NaN0 |
| Wheelbase: | 21000NaN0 |
| Maxspeed: | 1200NaN0 |
| Engine: | Cummins NT855-R4 |
| Enginetype: | Diesel |
| Cylindercount: | 6 |
| Poweroutput: | 310 HP |
| Transmission: | Voith T 211R |
| Hvac: | TRU–0454H |
| Electricsystem: | AC 440V |
The Korail Commuter Diesel Car or CDC for short were commuter diesel multiple units in South Korea. They were introduced in 1996. But due to the aging issue of the cars, they were fully retired on 17 December, 2023. Due to the aging isue of the trains, the Sea Train ended its operation on 25 December 2023 after 16 years of service.