Toyota NZ engine


The Toyota NZ engine family is a straight-4 piston engine series. The NZ series uses aluminium open deck engine blocks and DOHC cylinder heads. It also uses sequential multi-point fuel injection, and has 4 valves per cylinder with VVT-i.
The engines are produced by Toyota's Kamigo Plant in Toyota, Aichi, Japan; by Siam Toyota Manufacturing in Chonburi, Thailand ; and by Indus Motor Company in Karachi, Pakistan.
From the second half of 2003, the cylinder head of the Japanese market 1NZ-FE engine was revised and became the base of the post-2006 1NZ-FE Turbo and LPG-hybrid 1NZ-FXP engines.

1NZ-FXE (1997–present)

The 1NZ-FXE is a hybrid version. Bore and stroke is. It features forged steel connecting rods and an aluminum intake manifold. The engine has a high physical compression ratio of 13.0:1, but the closing of the inlet valve is delayed, for an effective compression ratio of 9.5:1. The net result is that the engine has a greater effective expansion than compression—making it a simulated Atkinson cycle, rather than a conventional Otto cycle.
The reduction in cylinder charge means reduced torque and power output, but efficiency is increased. This combination makes the 1NZ-FXE suitable for use with the Hybrid Synergy Drive, where peak torque and power demands can be met by the electric motor and battery. Originally, the engine produces at 4000 rpm with of torque at 4000 rpm. In the 2000 update, the engine output was increased to at 4500 rpm with of torque at 4200 rpm. The power output was increased again to at 5000 rpm for the second generation Prius.
Peak thermal efficiency is about 37%.
In 2011, upon the arrival of the Prius c/Aqua and the Vitz (XP130)|XP130 Yaris Hybrid], an improved version was introduced. Without any belt-driven accessories, implementation of exhaust gas recirculation system and a physical compression ratio of 13.4:1. The new version delivers an output of at 4800 rpm with of torque at 3600–4400 rpm.
The 1NZ-FXE Hybrid Synergy Drive in the Toyota Prius has won several International Engine of the Year awards:
  • Best Eco-friendly 2000
  • Best Eco-friendly 2001
  • Best Fuel Economy 2005
  • Best 1.4-litre to 1.8-litre 2005
  • Best Fuel Economy 2006
  • Best 1.4-litre to 1.8-litre 2006
This engine was discontinued for international markets in 2020 and was replaced by the M15A-FXE engine. However, as of January 2025, the 1NZ-FXE engine is still available in Japan.
Transmissions : P110, P111, P112 and P510

[|1NZ-FE] (1999–present)

The 1NZ-FE is a conventional Otto-cycle variant of the 1NZ-FXE with VVT-i on the intake camshaft. The engine block is found in many Toyota models assembled in Japan and Asian countries. It retains the same bore and stroke, but the compression ratio is lowered to 10.5:1. Output is at 6000 rpm with of torque at 4200–4800 rpm. This engine was introduced to replace 5A-FE and 5E-FE 1.5 L engines.
A new version of 1NZ-FE with major revision in the cylinder head was introduced exclusively for the Japanese market in September 2003, fitted first in the front-wheel drive model of XP80 Sienta.
This new version now features a new valve train mechanism with roller rocker arms and hydraulic lash adjuster, as opposed to bucket tappet mechanism in the older version, which also reduced the valves angle from 33 to 21⁰. The oil path was also modified for better lubrication in the reworked cylinder head, implementation of EGR system and a later opening thermostat. This revised engine can be identified by the use of a different plastic engine cover. Other Japanese market models received this version during the full model change starting with the XP90 Vitz in February 2005, except for the popular E120 Corolla when it was implemented in the April 2004 facelift. Another update was occurred in 2012, the compression ratio was increased to 11.0:1. The 4-speed automatic transmission was also replaced by CVT, designed for this reworked engine. The revised engine was also offered in limited markets such as in Hong Kong, Macau and New Zealand.
The 1NZ-FE engine was discontinued earlier in 2005 in Europe without a direct replacement. For emerging markets, the Dual VVT-i 2NR-FE engine was introduced as replacement in 2016. In the first half of 2020, the 1NZ-FE engine was replaced by M15A-FXS engine in Australia and New Zealand. In Japan, the older version was officially discontinued in September 2014, along with the first generation Probox/Succeed wagons. However, as of July 2025, the updated version is still in use for the Japanese market.
Transmissions:
  • Manual : C50, C50F, C51, C54, C56, C150 and C154
  • Automatic : U340E and U340F
  • CVT: K210, K310, K310F and K312
= Models powered by the original version

1NZ-FNE (2003–2014)

A compressed natural gas version of 1NZ-FE engine, introduced in April 2003 and produced exclusively for the first generation Probox van until its discontinuation in August 2014. It has 12.0:1 compression ratio, output is at 6000 rpm with of torque at 4000 rpm.
This engine was only combined with a sole 4-speed U340E automatic transmission.
Application:

[|1NZ-FE Turbo] (2003–2013)

The 1NZ-FE Turbo is a with an air-to-air intercooler turbocharged conventional Otto-cycle variant of the 1NZ-FE with VVT-i, combined with a IHI RHF4 turbocharger, providing of boost pressure. This engine was not created in-house by Toyota, but converted with bolt-on turbocharger kits developed by Toyota Racing Development. The engine block is the same as the naturally aspirated 1NZ-FE engine, found in many Toyota models. It retains the same 10.5:1 compression ratio as the naturally aspirated sibling. Output is at 6000 rpm with of torque at 4000–4800 rpm, depending on the model.
In Japan, this unique engine was available through modified Toyota cars and sold officially as complete car at Toyota Netz Store dealerships. The turbocharger kits is also available for sale at selected Toyota Netz Store dealerships or TRD official stores. This turbocharger kits was introduced first in May 2003, originally for the NCP13 Vitz RS. Later in January 2004, TRD launched "TRD Turbo Tuning Plan", a turbocharger conversion program for NCP31 bB, XP61 ist and NCP13 Vitz RS owners. The fully converted bB and ist with turbocharger and additional TRD kits were also offered at the selected Netz Store dealerships. The turbocharger conversion program was terminated in July 2007 with the discontinuation of XP60 ist.
Starting in August 2007, this turbocharged engine was updated to the new 1NZ-FE engine, which was first introduced in the Vitz RS TRD Turbo M, modified by Modellista based on the regular NCP91 Vitz RS. TRD released a slightly different 1NZ-FE Turbo engine exclusively for NZE141 Corolla Axio/Fielder GT TRD Turbo in October 2009 and March 2010. The final application of this engine was in August 2013, with Gazoo Racing releasing the Vitz GRMN Turbo and it was also the only model officially released by Toyota in Japan. The older version was also offered in several European countries and Thailand, but only in limited numbers.
This engine is commonly combined with C56 5-speed manual transmission, except for Corolla Axio/Fielder GT which had C51 transmission. The U340E 4-speed automatic transmission was only available for the TRD fully converted bB and ist complete cars or from several converted Vitz RS with automatic transmission owned by costumers.
= Models powered by the updated version

[|1NZ-FXP] (2017–present)

The 1NZ-FXP is a hybrid version. Bore and stroke is. This engine is based on the third generation 1NZ-FXE engine but converted to run on liquefied petroleum gas fuel and using the roller rockers arms valve train mechanism like the updated 1NZ-FE engine. The engine has a high physical compression ratio of 13.0:1, but the closing of the inlet valve is delayed, for an effective compression ratio of 9.5:1. The net result is that the engine has a greater effective expansion than compression—making it a simulated Atkinson cycle, rather than a conventional Otto cycle.
The reduction in cylinder charge means reduced torque and power output, but efficiency is increased. This combination makes the 1NZ-FXP suitable for use with the Hybrid Synergy Drive, where peak torque and power demands can be met by the electric motor, battery and LPG-hybrid system. Output is at 4800 rpm with of torque at 2800–4400 rpm.
Peak thermal efficiency is about 37%. This engine is mated to P510 eCVT transmission, same as the third generation 1NZ-FXE engine.
Application:

[|2NZ-FE] (1999–2020)

The 2NZ-FE is a version. Bore and stroke is, with a compression ratio of 10.5:1. Output is at 6000 rpm with of torque at 4400 rpm. Visually, this engine is identical to the 1NZ-FE, but can be identified by the 2NZ-FE mark on the intake manifold.
For specific regions with leaded petrol, the 2NZ-FE was not equipped with VVT-i. This version produces at 6000 rpm with of torque at 4400 rpm. The later version produces at 6000 rpm with of torque at 4200 rpm.
In 2000, it won the International Engine of the Year award in the 1-litre to 1.4-litre category.
This engine is the successor of 2E and 4E-FE 1.3 L engines. In China, it replaced the 2SZ-FE engine, together with the introduction of XP90 Vios/Yaris in 2008. The opposite case happened in Europe, like the 1.5 L 1NZ-FE engine, the 2NZ-FE engine was discontinued earlier in 2005, but succeeded by 2SZ-FE engine for the XP90 Yaris. In 2013, the exclusive Dual VVT-i 4NR-FE and 6NR-FE 1.3 L engines were introduced as the replacement for Chinese market XP150 Vios/Yaris. Later in 2016, the global version of those engines, called 1NR-FE, was introduced as the successor of 2NZ-FE engine for emerging markets XP150 Vios/Yaris. The last use of 2NZ-FE engine was in Australasia and Pakistan, where it was discontinued in the first half of 2020.
Transmissions:

Great Wall Motor version

In May 2008, Chinese automobile manufacturer Great Wall Motor introduced 1.3 and 1.5 L engines codenamed GW4G13 and GW4G15. Despite the similar codes, they have nothing to do with 4G13 and 4G15 engines from the Mitsubishi Orion engine family, but instead derived from NZ design. For example, the NZ engines are using timing chain to connect the crankshaft and camshafts, while the Mitsubishi Orion engines are using the less durable timing belt. Visually, this engine looks similar like the NZ engines and mechanically also share similarities such as the same bore x stroke size, engine displacement and interchangeable parts.
No statement from GWM or Toyota regarding the confirmation if these engines are officially licensed by GWM. But according to the official press release by GWM in 2009, these GW4G1x engines were independently developed by themselves. There are also no reports of Toyota taking legal action against GWM regarding the intellectual property rights of NZ engines or even their copied vehicles, such as the Deer truck or the Coolbear hatchback. Only 1.3 L 2NZ-FE and 1.5 L 1NZ-FXE engines were officially available in China. The former was fitted inside the locally assembled XP90 Vios sedan /Yaris hatchback from 2008 to 2013, while the latter was offered for the locally assembled XW20 Prius.
The turbocharged variants of the 1.5 L engine called GW4G15T was introduced in 2011 and then followed by the higher output GW4G15B in the following year. These engines were discontinued in 2019, replaced by the cleaner GW4G15F which comply with China's National V emission standard. Further new variants which comply with National VI emission standard codenamed GW4G15K, GW4G15M and the naturally aspirated hybrid GW4G15H are also introduced. Unlike the naturally aspirated version, these turbocharged/hybrid engines are distinguishable by their black cylinder head covers and distinct top shape.

GW4G13

Power: at 6,000 rpm
Torque: at 4,200 rpm
Applications:

GW4G15

Power: at 6,000 rpm
Torque: at 4,200 rpm
Applications:

GW4G15T

Power: at 5,600 rpm
Torque: at 2,000–4,500 rpm
Applications:

GW4G15B

Power: at 5,600 rpm
Torque: at 2,200–4,500 rpm
Applications:

GW4G15F

Power: at 5,600–6,000 rpm
Torque: at 1,800–4,400 rpm
Applications:

GW4G15K

Power: at 5,500–6,000 rpm
Torque: at 2,000–4,400 rpm
Applications:

GW4G15M

Power: at 5,500–6,000 rpm
Torque: at 1,800–4,400 rpm
Applications:

GW4G15H

Power:



Torque:



Applications: