From 2005 to 2010, the company produced the 2.0-liter Mazda RF7J diesel engine, which was fitted to the popular third, fifth, or sixth series models in Europe. In essence, this power unit was an updated version of the popular RF5C diesel engine.
The RF5C and R2AA diesel engines are also part of the MZR-CD family.
The engine was mounted on:
- Mazda 3 BK in 2006 – 2009;
- Mazda 5 CR in 2005 – 2010;
- Mazda 6 I (GG) in 2005 – 2007;
- Mazda 6 II (GH) in 2007 – 2008.
Specifications
| Production years | 2005-2010 |
| Displacement, cc | 1998 |
| Fuel system | Common Rail |
| Power output, hp | 110 – 145 |
| Torque output, Nm | 310 – 360 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 86 |
| Compression ratio | 16.7 |
| Features | SOHC |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | IHI VJ36 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.8 |
| Fuel type | diesel |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Mazda 6 2006) — city — highway — combined |
7.5 5.1 6.0 |
| Engine lifespan, km | ~280 000 |
| Weight, kg | 197 |
Disadvantages of the Mazda RF7J engine
Burnouts of the sealing washers beneath the nozzles are the main source of the issues.
Lubricant and fuel are frequently mixed together by the nozzles’ return flow.
Oil leaks are mostly caused by intercooler flange cracks.
Diesel fuel may also get into the oil here while the particulate filter burns.
The SCV valve in the high pressure fuel pump, vacuum pump, and mass air flow sensor are additional engine flaws.