Engine Peugeot EW7J4

The 1.8-liter Peugeot EW7J4 or 6FZ engine was produced from 2000 to 2008 in France and was installed on a number of popular mid-size models of the concern, such as 406 and 407. Around 2006, this power unit began to be replaced by an updated EW7A engine.

Engines of the EW family: EW7J4, EW7A, EW10J4, EW10D, EW10A, EW12J4.

The engine was installed on:

  • Peugeot 406 I (D8/D9) in 2001 – 2004;
  • Peugeot 407 I (D2) in 2004 – 2006;
  • Citroen C5 I (X3/X4) in 2004 – 2008;
  • Citroen Xsara Picasso I (N68) in 2000 – 2005.


Production years 2000-2008
Displacement, cc 1749
Fuel system injector
Power output, hp 117
Torque output, Nm 160
Cylinder block aluminum R4
Block head aluminum 16v
Cylinder bore, mm 82.7
Piston stroke, mm 81.4
Compression ratio 10.8
Features no
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-40
Engine oil capacity, liter 4.25
Fuel type petrol
Euro standards EURO 3
Fuel consumption, L/100 km (for Peugeot 407 2005)
— city
— highway
— combined
Engine lifespan, km ~250 000
Weight, kg 130

Disadvantages of the EW7J4 engine

  • Most of the problems of the power unit are somehow related to lubricant leaks;
  • Oil likes to ooze from under the valve cover, leak from the breather, or just burn out;
  • In second place are frequent failures of ignition system components, especially coils;
  • The culprit of the floating engine speed is contamination of the throttle or idle speed controller;
  • After 100,000 km, engine mounts and hydraulic lifters often require replacement.

1 thought on “Engine Peugeot EW7J4”

  1. -je veux avoir le catalogue pour toutes les références des pièces mécaniques pour mon moteur 406 essence 2002 4.8l 16v double arbre a cames 8B 6FZ EW7J4 .
    EN OUTRE je veux avoir est ce que je peut utiliser le demis moteur du moteur ew10j4 a la place du demis moteur ew7j4 ?.
    je ne trouve pas le bloc cylindre de ma 406 cela m’a désespéré.

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