The BMW M67D40 engine is the first engine in the M67 series and is also known as the M67D39. The 3.9-liter power unit was available in three versions and was produced from 1999 to 2005.
The first version with 238 hp was produced between 1999 and 2000 and was installed on the E38 740d.
The second version of the M67D40O0, with a capacity of 245 hp, was produced from 2000 to 2001 for the restyled 740d E38 LCI.
The third version of the M67TUD39/D40 with 258 hp was introduced in September 2002 and is the most powerful among the 4.0-liter M67. The engine was produced until 2005 and installed on the 740d E65. The M67D39TU has a modified turbocharger, pistons and connecting rods as in the M47TU and M57TU, belt drive with mechanical tensioner, engine mount changed, radiator and intake air cooler completely made of aluminum (same as in the M57TU), DDE 4.1 engine management system changed to DDE 5.1 and a 2nd generation Common Rail injection system with a nominal pressure of 1600 bar is installed.
The M67 family also includes: M67D44.
The engine was installed on:
- BMW 7-Series E38 in 1999 – 2001;
- BMW 7-Series E65 in 2001 – 2005.
Specifications
| Production years | 1999-2005 |
| Displacement, cc | 3901 |
| Fuel system | Common Rail |
| Power output, hp | 238 (M67D40) 245 (M67D40O0) 258 (M67D40TU) |
| Torque output, Nm | 560 (M67D40) 600 (M67D40TU) |
| Cylinder block | cast iron V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 84 |
| Piston stroke, mm | 88 |
| Compression ratio | 18.0 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | biturbo |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 8.75 |
| Fuel type | diesel |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for BMW 745d 2005) — city — highway — combined |
12.8 6.8 9.0 |
| Engine lifespan, km | ~350 000 |
Disadvantages of the M67D40 engine
- This motor is very reliable, but it is difficult to find a service station that will undertake its repair;
- Turbines cause the most problems: the resource is modest, but they are very expensive;
- Another weak point of a diesel engine is flow meters, they have to be changed often;
- Loss of traction or erratic engine operation hints at contamination of the AGR valve;
- Also, the valves in the oil cup and the crankcase ventilation system are often disturbed.
