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 (1NZ-FE for Yaris and Vios); and by Indus Motor Company in Karachi, Pakistan (2NZ-FE for Corolla).
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 XP130 Yaris Hybrid, an improved version was introduced. Without any belt-driven accessories (equipped with an electric water pump), implementation of exhaust gas recirculation (EGR) 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, , the 1NZ-FXE engine is still available in Japan in the Toyota Probox and Mazda Familia.
Transmissions (eCVT): P110 (1997–2000), P111 (2000–2003), P112 (2003–2009) and P510 (2011–present)
Applications
Toyota Corolla Axio/Fielder Hybrid NKE165 (2013–2025) Toyota Prius NHW10/NHW11 (1997–2003) NHW20 (2003–2009) Toyota Prius c/Aqua NHP10 (2011–2021) Toyota Probox Hybrid NHP160V (2018–present, also sold as Succeed Hybrid until 2020 and as Mazda Familia Van Hybrid (NHP160M) from 2018) Toyota Sienta Hybrid NHP170G (2015–2022) Toyota Yaris Hybrid NHP130 (2012–2020, Europe)/Vitz Hybrid NHP130 (2017–2019, Japan) (2014–2025, based on Corolla Axio/Fielder Hybrid NKE165)
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 (HLA), 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 (raised from 82 to 88°C). 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 (5-speed): C50, C50F (AWD), C51, C54, C56, C150 and C154 Automatic (4-speed): U340E and U340F (AWD, 2000–2014) CVT: K210 (2003–2015; Ractis, Sienta and Vitz), K310 (2006–2012), K310F (AWD, 2006–present) and K312 (2012–present)
Applications
= Models powered by the original version
Toyota Allion/Premio NZT240 (2001–2007)* NZT260 (2007–2021) Toyota Auris (Japan only) NZE151H/NZE154H (2006–2012) NZE181H/NZE184H (2012–2018) Toyota bB NCP31/NCP35 (2000–2005, also sold as Scion xB with this engine in the United States from 2003 to 2007)* Toyota Corolla NZE121/NZE124 (2000–2006, including Japanese market Allex/Corolla RunX hatchbacks)* NZE141 (2007–2013, RHD "General Specification" market such as Bangladesh, Hong Kong, Jamaica, Trinidad and Tobago, etc)* Toyota Corolla Axio/Fielder NZE141/NZE144 (2006–2012) NZE161/NZE164 (2012–2025) Toyota Corolla Rumion NZE151N (2007–2016) Toyota Corolla Spacio NZE121N (2001–2007)* Toyota ist NCP61/NCP65 (2002–2007, also sold as the xA in the Middle East and as Scion xA with this engine in the United States from 2003 to 2007)* NCP110/NCP115 (2007–2016) Toyota Platz/Echo sedan/Yaris sedan NCP12 (1999–2005)* Toyota Porte NNP11/NNP15 (2004–2011)* NCP141/NCP145 (2011–2020, also sold as Spade) Toyota Probox NCP51V/NCP55V/NCP58G/NCP59G (2002–2014)* NCP160V/NCP165V (2014–present, also sold as Succeed until 2020 and as Mazda Familia Van (NCP160M) from 2018) Toyota Ractis NCP100/NCP105 (2005–2010)* NCP120/NCP122/NCP125 (2010–2016, also sold as Subaru Trezia) Toyota Raum NCZ20/NCZ25 (2003–2011)* Toyota Sienta NCP81G/NCP85G (2003–2015)* NCP175G (2015–2022) (Japan only) Toyota Succeed NCP51V/NCP58G/NCP59G (2002–2014)* Toyota Vios* NCP42 (2002–2007, up to 2014 in Taiwan) NCP93 (2007–2013, also sold as Yaris sedan up to 2016 in Australia and Mexico) NCP150 (2013–2016, also sold as Yaris sedan) Toyota Yaris hatchback (international)/Vitz (Japan)* NCP13 (1999–2005, also sold as Echo hatchback in several markets) NCP91 (2005–2013) NCP131 (2010–2020) NCP150 (2013–2017, not marketed as Vitz) Toyota Yaris Verso/FunCargo NCP21/NCP25 (1999–2005)* Mitsuoka Galue 204/Classic (2008–2012, based on Corolla Axio NZE141) Mitsuoka Nouera 602 (2008–2012, based on Corolla Axio/Fielder NZE141) Mitsuoka Ryugi (jp) (2014–2025, based on Corolla Axio/Fielder NZE161/NZE164) Tommykaira Baby Gang (2001, based on Vitz NCP13)* Tommykaira ist (2002, based on ist NCP61 and tuned with supercharger)* WiLL Cypha NCP75 (2002–2005)* WiLL VS NZE127 (2001–2004)*
1NZ-FNE (2003–2014) A compressed natural gas (CNG) 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: Toyota Probox DX NCP52V (2003–2014)
1NZ-FE Turbo (2003–2013)
The 1NZ-FE Turbo (unofficially called 1NZ-FTE or 1NZ-FET) 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 (TRD). 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 (tuned by TRD, Modellista or Gazoo Racing) 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 (GR) 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 customers.
Applications = Models powered by the updated version
Toyota bB TRD Turbo NCP31 (2004–2005, tuned by TRD) Toyota Corolla Axio/Fielder GT TRD Turbo NZE141 (2009–2012, tuned by TRD)* Toyota ist TRD Turbo NCP61 (2004–2007, tuned by TRD) Toyota Soluna Vios Turbo NCP42 (2005, limited edition of 600 units for Thai market, tuned by TRD) Toyota Vitz/Yaris Vitz RS Turbo Powered by TRD NCP13 (2003, tuned by Modellista) Yaris TS Turbo NCP13 (2003, limited to 400 units for European market, tuned by TRD) Vitz TRD Turbo M NCP91 (2007–2009, tuned by Modellista)* Vitz GRMN Turbo NCP131 (2013, limited edition of 200 units, tuned by Gazoo Racing)*
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 (LPG) 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.