Engine Toyota 1AZ-FE

The 2.0-liter Toyota 1AZ-FE or 2.0 VVT-i engine was assembled by the company from 2000 to 2014 and installed on such well-known concern models as the Camry, RAV4, Ipsum and Avensis Verso. Most versions of the power unit were equipped with a VVT-i phase regulator on the intake shaft.

The AZ series also includes engines: 1AZ‑FSE, 2AZ‑FE, 2AZ‑FSE and 2AZ‑FXE.

In 2000, a 2.0-liter gasoline engine made its debut on the RAV4 crossover to replace the 3S-FE. This is an engine with an aluminum block, cast iron sleeves and an open cooling jacket, an aluminum 16-valve DOHC head without hydraulic lifters and a timing chain drive. Almost all engine modifications had an inlet phase regulator and a block of balancer shafts.

In 2006, in connection with the transition to Euro 4 environmental standards, this motor was modernized. In addition to the updated piston, an ETCS-i electric choke appeared (it was immediately on a number of markets), more modern sensors, a slightly different phase regulator, a generator already with an overrunning clutch, and a spacer in the cooling jacket to improve heat dissipation in the upper part of the cylinder. Like its counterparts in the series, this power unit received cylinder head bolts with a longer thread.

The engine was installed on:

  • Toyota Avensis Verso 1 (XM20) in 2001 – 2009;
  • Toyota Aurion 1 (XV40) in 2006 – 2009;
  • Toyota Camry 5 (XV30) in 2001 – 2006; Camry 6 (XV40) in 2006 – 2012; Camry 7 (XV50) in 2012 – 2014;
  • Toyota Ipsum 2 (XM20) in 2001 – 2009;
  • Toyota RAV4 2 (XA20) in 2000 – 2005; RAV4 3 (XA30) in 2005 – 2010.


Production years 2000-2014
Displacement, cc 1998
Fuel system distributed injection
Power output, hp 134 – 152
Torque output, Nm 190 – 194
Cylinder block aluminum R4
Block head aluminum 16v
Cylinder bore, mm 86
Piston stroke, mm 86
Compression ratio 9.5 – 9.8
Features DOHC, ETCS-i
Hydraulic lifters no
Timing drive chain
Phase regulator VVT-i
Turbocharging no
Recommended engine oil 0W-30, 5W-30
Engine oil capacity, liter 4.2
Fuel type petrol
Euro standards EURO 3/4
Fuel consumption, L/100 km (for Toyota RAV4 2003)
— city
— highway
— combined
Engine lifespan, km ~400 000
Weight, kg 131

Disadvantages of the 1AZ-FE engine

  • In the engines of the first years of production, cylinder head bolts with too short threads were used, which resulted in a breakdown of the gasket and the appearance of an emulsion in the expansion tank. In 2006, the manufacturer increased the length of the thread and the problem became less common.
  • Oil consumption after 150,000 km of run is a characteristic feature of engines after 2006, probably due to the renewal of the piston using thin oil scraper rings.
  • The single-row bush-roller chain of the AZ motor is more reliable than modern lamellar ones, but closer to 200,000 km of run it often needs to be replaced, usually together with a phase regulator.
  • This power unit does not tolerate low-quality fuel and gets dirty pretty quickly from it. The search for the cause of floating engine speeds should start with cleaning the throttle, mass air flow sensor and injectors.
  • The water pump and the overrunning clutch of the generator are also distinguished by a low resource here. And since there are no hydraulic lifters, every 100,000 km you need to adjust the valve clearance.

5 thoughts on “Engine Toyota 1AZ-FE”

    1. As is mentioned before – oil consumption after 150,000 km of run is a characteristic feature of engines after 2006, probably due to the renewal of the piston using thin oil scraper rings.

      The easiest way to solve the issue is to just monitor the oil level (weekly or monthly, depending on how much you drive), keep an oil canister in the trunk and add oil as it depletes. Oil is cheap. If the engine oil has never been changed, then its most likely contaminated with oil, grease and microscopic metal parts from the engine and you should consult with a mechanic beforehand.

  1. I have a voxy make 2002 engine 1AZ, changed the gasket and it has developed another problem, when i put water in the radiator i don’t know where the water is going even when i don’t start the engine, and when i start the engine after 20min it’s dry, what could be the problem?

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