Korail Commuter Diesel Car
In service	1996–2023
Manufacturer	Daewoo Heavy Industries
Constructed	1996–1999
Entered service	1999
Number built	131
Number in service	10
Capacity	79–89 seats
Operators	Korail
Specifications
Train length	20,900 mm (68 ft 7 in)
Width	3,200 mm (10 ft 6 in)
Height	4,200 mm (13 ft 9 in)
Wheel diameter	860 mm (2 ft 10 in)
Wheelbase	2,100 mm (6 ft 11 in)
Maximum speed	120 km/h (75 mph)
Prime mover(s)	Cummins NT855-R4
Engine type	Diesel
Cylinder count	6
Power output	310 HP
Transmission	Voith T 211R
HVAC	TRU–0454H
Electric system(s)	AC 440V
Track gauge	1,435 mm (4 ft 8+1⁄2 in)

The Korail Commuter Diesel Car (Korean: 도시통근형 디젤 액압 동차) or CDC for short were commuter diesel multiple units in South Korea. They were introduced in 1996.^[1] 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 (Korail) |Sea Train]] ended its operation on 25 December 2023 after 16 years of service.

• Byun, Seong Woo (August 1999). 한국철도차량 100년사: 철도차량기술검정단 한국철도차량 100년사 편찬위원회 편찬 [100 Years of Korean Railway Vehicles: Compilation of the 100 Year History of Korean Railroad Vehicles by the Railroad Vehicle Technology Inspection Group] (in Korean). Seoul: Railroad Vehicle Technology Inspection Team.