Toyota 1MZ

Toyota 1MZ-FE Engine

  1. Specifications
  2. Overview, problems
  3. Performance tuning

Toyota 1MZ engine specs

Manufacturer Kamigo Plant
Toyota Motor Manufacturing Kentucky
Also called Toyota 1MZ
Production 1994-2007
Cylinder block alloy Aluminum
Configuration V6
Valvetrain DOHC
4 valves per cylinder
Piston stroke, mm (inch) 83 (3.27)
Cylinder bore, mm (inch) 87.5 (3.44)
Compression ratio 10.5
Displacement 2995 cc (182.8 cu in)
Power output 140 kW (190 HP) at 5,400 rpm
156 kW (210 HP) at 5,800 rpm
Torque output 275 Nm (203 lb·ft) at 4,400 rpm
328 Nm (222 lb·ft) at 4,400 rpm
HP per liter 63.4
Fuel type Gasoline
Weight, kg (lbs) 158 (350)
Fuel consumption, L/100 km (mpg)

for Camry XV30
15.7 (15)
8.3 (28)

11.0 (21)
Turbocharger  Naturally aspirated
Oil consumption , L/1000 km
(qt. per miles)
up to 1.0
(1 qt. per 750 miles)
Recommended engine oil 5W-30
Engine oil capacity, L (qt.) 4.7 (5.0)
Oil change interval, km (miles) 5,000-10,000
Normal engine operating temperature, °C (F)
Engine lifespan, km (miles)
-Official information

300,000+ (180,000)
Tuning, HP
-Max HP
-No life span loss


The engine is installed in Toyota Avalon
Toyota Camry
Toyota Estima/Previa
Toyota Highlander
Toyota Sienna
Lexus ES300/Toyota Windom
Lexus RX300
Toyota Harrier
Toyota Alphard
Toyota Solara

Toyota 1MZ-FE engine reliability, problems and repair

The 1MZ-FE type with a 3-liter displacement replaced the 3VZ in 1994 and was produced till 2007. The 1MZ is provided with 60° aluminium cylinder block, forged crankshaft, and lightweight pistons and connecting rods.
Moreover, the engine was provided with an EGR exhaust gas recirculation system, intake manifold with an ACIS variable intake system. The latest 1MZs were equipped with a VVTi variable valve timing system on the inlet camshaft, and also an electronic throttle body. The 1MZ is not provided with hydraulic lifters, so you need to adjust its valves each 60,000 miles (100,000 km) of mileage. The size of the 1MZ stock fuel injectors is 245 cc. Firing order in the 1MZ is 1-2-3-4-5-6.
The 1MZ was fitted with a toothed timing belt, which can be replaced each 90,000 miles (150,000 km) of mileage.
In general, the 3-liter 1MZFE is typical Toyota engine fitted for midsize and full-size vehicles.
Since 2003 the 1MZ engine was replaced with a new 3GR.

Toyota 1MZ engine problems and malfunctions

1.High oil consumption. Usually, 1MZ engines are quite out-dated with a long run. The problem associated with high oil consumption is a usual thing for them. Perhaps, your 1MZ-FE needs an overhaul.
2. Reduced engine power. Replace knock sensors. They often become disarranged in the 1MZ.
3. Rough idle. If any, you should cleanse the throttle body, injectors and check the VVTi valve. It may need a replacement. Moreover, a bad VVTi valve can result in 1MZ-FE jerking, misfire, vibrations and so on, and so forth.
The 1MZ tends to be carbonized, its VVTi system starts to leak in some period of time, the motor operates the way a diesel engine does. That can be repaired by repair the VVTi system.
If it is regularly maintained and smoothly run, the motor is quite safe and serves long. The 1MZ-FE engine lifespan is more than 200,000 miles (300,000 km) of mileage.
The 1MZ is officially considered to be irreparable like other latest Toyota engines. If you face the music, you need to buy a contract 1MZ-FE engine or look for another kind of service personnel who fix the kind of engines.

Toyota 1MZ engine tuning

1MZ Supercharger

To increase the 1MZ capacity is quite easy. For doing it, there is a great many of ready tools, which are up for grabs. It is easier to buy a TRD supercharger kit. The set is easy to bolt on the stock internals and allows you to develop about 270 horsepower at a boost pressure of 7 psi (0.5 bar). It is dangerous to further increase pressure on the stock pistons. That why, to get higher capacity, you need to buy forged pistons, H-beam rods and do port- and-polish.
To get a true stunning capacity, it is better to buy the 1JZ/2JZ engines and improve them.