Engine Mazda KJ-ZEM

The 2.3-liter gasoline V6 Mazda KJ-ZEM engine was assembled in Japan from 1993 to 2002 and installed on the popular Millenia model, as well as its modifications Xedos 9 and Eunos 800. This engine stood out in its lineup for the presence of a compressor and work on the Miller cycle.

The K-engine family includes: K8‑DE, K8‑ZE, KF‑DE, KF‑ZE, KL‑DE, KL‑G4, KL‑ZE.

The engine was installed on:

  • Mazda Eunos 800 TA in 1993 – 1998;
  • Mazda Millenia TA in 1994 – 2002;
  • Mazda Xedos 9 TA in 1993 – 2002.


Production years 1993-2002
Displacement, cc 2255
Fuel system distributed injection
Power output, hp 210 – 220
Torque output, Nm 280 – 290
Cylinder block aluminum V6
Block head aluminum 24v
Cylinder bore, mm 80.3
Piston stroke, mm 74.2
Compression ratio 10.0
Features Miller Cycle
Hydraulic lifters no
Timing drive belt
Phase regulator no
Turbocharging compressor
Recommended engine oil 5W-30
Engine oil capacity, liter 4.1
Fuel type petrol
Euro standards EURO 3
Fuel consumption, L/100 km (for Mazda Millenia 1995)
— city
— highway
— combined
Engine lifespan, km ~250 000
Weight, kg 205

Disadvantages of the Mazda KJ-ZEM engine

  • Compressor failures are the main problem;
  • The aluminum block is also very afraid of overheating, keep an eye on the cooling system;
  • On runs over 100,000 km, the engine often consumes about 1 liter of oil per 1000 km;
  • The timing belt is designed for 80,000 km, the replacement is expensive, but when it breaks, the valves do not bend;
  • There are no hydraulic lifters and valve clearances need to be adjusted every 100,000 km.

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