Engine Mazda RF7J

The 2.0-liter Mazda RF7J diesel engine was produced by the company from 2005 to 2010 and was installed on the European versions of the popular models of the third, fifth or sixth series. This power unit was essentially a modernized version of the well-known RF5C diesel engine.

The MZR-CD family also includes diesel engines: RF5C and R2AA.

The engine was installed 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.


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
Engine lifespan, km ~280 000
Weight, kg 197

Disadvantages of the Mazda RF7J engine

  • Most of the problems are caused by burnouts of the sealing washers under the nozzles.
  • Often the return flow of the nozzles also flows, which leads to the mixing of the lubricant with the fuel.
  • The main source of oil leaks are cracks in the intercooler flanges.
  • During the burning of the particulate filter, diesel fuel can also enter the oil here.
  • Other weaknesses in the engine include: SCV valve in the high pressure fuel pump, vacuum pump and mass air flow sensor.

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