The 1.4-liter Mini One D W17D14 diesel engine was assembled by the company between 2003 and 2006, and in its original One modification, it was only installed on the three-door Hatch in the R50 body. A version with 75 horsepower was manufactured between 2003 and 2005 before the engine’s power was increased to 88 horsepower. These vehicles are replicas of the Toyota 1ND-TV diesel.

W17D14, W16D16, N47C16A, N47C20A, B37C15A, and B47C20A are MINI diesel engines.
Specifications
| Production years | 2003-2006 |
| Displacement, cc | 1364 |
| Fuel system | Common Rail |
| Power output, hp | 75 (2003 – 2005) 88 (2005 – 2006) |
| Torque output, Nm | 180 (2003 – 2005) 190 (2005 – 2006) |
| Cylinder block | aluminum R4 |
| Block head | aluminum 8v |
| Cylinder bore, mm | 73 |
| Piston stroke, mm | 81.5 |
| Compression ratio | 18.5 (2003 – 2005) 17.9 (2005 – 2006) |
| Features | SOHC, intercooler |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | Toyota CT2 (2003 – 2005) Garrett GTA1444V (2005 – 2006) |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.3 |
| Fuel type | diesel |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Mini One D 2005) — city — highway — combined |
5.8 4.3 4.8 |
| Engine lifespan, km | ~250 000 |
The engine was installed on:
- Mini Hatch R50 in 2003 – 2006.
Disadvantages of the Mini W17D14 engine
The engine’s primary issues are related to fuel-demanding piezo injectors.
Because of the occurrence of oil scraper rings, lubricant consumption comes in second.
Additionally, clogged crankcase ventilation frequently causes oil to seep through all of the seals.
Periodically, the fuel pressure regulator fails and the injection pump leaks.
Even now, when the glow plugs are unscrewed, they frequently burrow and break off.
