The engine series shares many of the technologies in the AZ engine, while incorporating features such as variable valve timing on both intake and exhaust camshafts or dual VVT-i, low friction technologies including an offset crankshaft, roller rockers for the valvetrain, a three-stage variable oil pump, reduced-tension piston rings and auxiliary belt drive.

An Acoustic Control Induction System switches the length of the intake tract in two stages, based on rpm and throttle angle, thereby ensuring strong torque across a broad engine speed range.

New tumble control valves enhances combustion while the engine is cold, and helps to bring the catalytic converters up to working temperature quickly.

The cylinder block is an open-deck, midi-skirt type with cast-in iron liners and a die-cast aluminium lower crankcase and a stamped oil pan.

The engine is used in vehicles sold in Japan, U.S., Australia,[5] New Zealand,[6] China, Taiwan, Korea, Malaysia, Philippines, Thailand[7] Indonesia, and Middle East.

[9] Geometrical compression ratio is 12.5:1 The large valve overlap leads to a reduction in cylinder charge and reduced torque and power output, but efficiency is increased.

This combination makes the 2AR-FXE suitable for use in hybrid vehicles, where peak torque and power demands can be met by the electric motor and battery.

It has the same bore and stroke as other 2AR engines but the cylinder head, cams, pistons and fuel management system are unique.

[13] Applications: The 6AR-FSE is a 4-cylinder, 1998 cc, twincam, petrol engine equipped with D4-S direct fuel injection and VVT-iW.

[16] Applications: A 2.0 L turbocharged direct-injected member of the AR family, fitted with VVT-iW it is able to operate in both the Otto and a modified-Atkinson cycle.