The valve mechanism is equipped with 4-Valves per cylinder, DOHC, and implemented Toyota's Dual VVT-i and VVT-iW.

The 1NR-FE is a compact 1.3-litre inline-four piston engine featuring Stop & Start technology and Dual VVT-i.

Improved engine performance combined with low emissions and fuel consumption was the principal aim during its development.

Applications: Fitted to the Toyota Etios and Yaris hatchback made in Brazil, available only as a flexfuel, 1.3 litre, with VVT-i.

Toyota says that with idling stop and other functions, it will lead to fuel efficiency gains of approximately 15 per cent.

Main differences between 1NR-FE : Applications: A 1.5 L (1,496 cc) variant of the NR series engine, first introduced in the fourth quarter of 2010 for the Toyota Etios.

A new innovation was introduced to this engine with the integration of the exhaust manifold into the cylinder head[6] to reduce emissions.

An idle stop-start system is introduced for the Perodua Myvi and Toyota Rush (since 2021) to enhance fuel efficiency.

The commercial variant used in the Daihatsu Gran Max has different output adjustment but still features Dual VVT-i.

torque: Compression Ratio: 11.5:1; Indonesian Euro 4 version: 10.5:1 Applications: Based on the 1.5-litre 2NR-VE engine, the 2NR-VEX unit is an Atkinson cycle engine used with a hybrid system paired with an electric motor and a lithium-ion battery.

Main differences between 2NR-FE: Applications: Implements variable valve timing system VVT-iE and engine operation by Miller / Atkinson cycle.