| Series 2131 | |
| Powertype: | Diesel-hydraulic |
| Builder: | Đuro Đaković (license from Jenbach) |
| Uicclass: | C |
| Length: | 9.50NaN0 |
| Locoweight: | 42.5 tonnes |
| Maxspeed: | 30/60 km/h |
| Poweroutput: | 340 hp |
| Operatorclass: | HŽ 2131 |
| Nicknames: | "Jenbach" |
| Locale: | Croatia |
Series 2131 (ex JŽ 731) is a diesel locomotive series on Croatian Railways (Croatian: hrvatske željeznice, HŽ).