The engines are identified in one of the following ways
- Engraving
- Plates fixed to the cylinder block
The shaded area "a" records
- The component reference
- The legislation type
- Serial number
(1) engine type stamped plate
(2) identification plate
The identification plate (2) records
- Unit number
- Serial number
| engine code | legislation type |
|---|---|
| TU1/K/N TU1W | H1B |
| TU1CP | HAZ |
| TU1M/L/Z | HDY - HDZ |
| TU1TR | H3A |
| TU1/K | H1A |
| TU2.4 | M4A |
| TU3/A/K TU3A/N | K1G - K1H - K1F |
| TU3S/K | K2A |
| TU3SN | K2B |
| TU3.2/K | K2D |
| TU3.2/W | K2C |
| TU3TR | K3A |
| TU3M/Z | KDZ - KDY |
| TU3/N | K1B |
| TU3/K | KAY |
| TU3/K | K1A |
| TU9/K | C1A |
| TU9M/L/Z | CDY - CDZ |
| TU9TR/K | C3A |
| TU3JP | KFX |