Engine Mazda KL-DE

The Mazda KL-DE 2.5-liter V6 engine was produced at the company’s factories from 1992 to 2002 and was installed on European and American modifications of the 626, MX-6 or Millenia models. This power unit is also known as the KL-03 and was found under the hood of the Ford Probe.

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

The engine was installed on:

  • Mazda 626 GE in 1992 – 1997;
  • Mazda Millenia TA in 1994 – 2002;
  • Mazda MX-6 GE in 1992 – 1997;
  • Mazda Xedos 9 TA in 1993 – 2002.


Production years 1992-2002
Displacement, cc 2497
Fuel system distributed injection
Power output, hp 165 – 175
Torque output, Nm 210 – 220
Cylinder block aluminum V6
Block head aluminum 24v
Cylinder bore, mm 84.5
Piston stroke, mm 74.2
Compression ratio 9.2
Features DOHC, VRIS
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 4.0
Fuel type petrol
Euro standards EURO 3
Fuel consumption, L/100 km (for Mazda Millenia 2001)
— city
— highway
— combined
Engine lifespan, km ~450 000
Weight, kg 171 (with attachments)

Disadvantages of the Mazda KL-DE engine

  • With reliability, the engines of this series are all right;
  • The aluminum block here is very afraid of overheating, watch the cooling system;
  • Valve cover gaskets to 100,000 km often lose their tightness and leak;
  • The timing belt serves approximately 80 – 90 thousand km, but when it breaks, the valve does not bend;
  • Due to poor-quality lubrication, hydraulic lifters can knock even up to 50,000 km.

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