| TCDD E14000 | |
| Service: | 1979 - 2013 |
| Manufacturer: | Tüvasaş |
| Factory: | Adapazarı Vagon Fabrikası |
| Fleetnumbers: | E14001 - E14... |
| Successor: | TCDD E23000 TCDD E32000 |
| Operator: | Turkish State Railways |
| Depots: | Haydarpaşa, Halkalı, Ankara, Adapazarı |
| Lines: | Commuter rail |
| Yearservice: | 1979 |
| Yearscrapped: | 2013-2014 |
| Numberbuilt: | 75 |
| Numberservice: | 0 (all of them are out of service) |
| Carbody: | steel |
| Trainlength: | 68frac=16NaNfrac=16 (3 cars per set) |
| Entrylevelorstep: | high floor |
| Doors: | 8 doors per car (4 on each side) / 24 per set (12 on each side) |
| Maxspeed: | 120 km/h |
| Poweroutput: | 520 kW |
| Transmission: | coupled direct to traction serial motor |
| Powersupply: | Overhead wire / Faveley pantograph (1 unit per set) |
| Electricsystem: | 25 kV 50 Hz AC |
| Brakes: | Wenn type - Air compressor service provided |
TCDD E14000 were electric multiple unit used by the Turkish State Railways on their commuter rail services around Istanbul, Ankara and İzmir. The 75 units were delivered starting in 1979 to supplement the aging E8000 units that were in use on the European Istanbul service, when the other commuter train services were electrified.
Though the units still remain in service, they are heavily used and show signs of wear. It is not uncommon for doors not to shut, and TCDD is planning a major replacement of the stock with the Marmaray upgrade that is in progress.