The ZR engine family, introduced in 2007 by Toyota Motor Corporation, uses a DOHC 16-valve cylinder head with a 4-cylinder die-cast block. Engines displace either 1.6-liters, 1.8-liters or 2.0-liters. All engines in this family are equipped with Toyota's dual VVT-i technology that optimizes both intake and exhaust valve timing. This engine family is also the first to use Toyota's Valvematic system, first appearing on the Noah and Voxy in 2007 and then the European Avensis in 2009.
The Toyota 1ZR-FE is a DOHC, 16-valve, 1.6 L (1598cc) engine equipped with dual VVT-i. This engine is available with either manual gearbox (5 Speed) or a "multi-mode" manual transmission (MM-T 5 Speed). For the Corolla Altis, the available transmission options are the manual gearbox (6 speed) or a 4 speed gate type automatic transmission. Output for this engine is rated at 124 hp (92 kW) at 6000 rpm and 116 lb·ft (157 N·m) of torque at 5200 rpm net.
The Toyota 1ZR-FAE is a DOHC, 16-valve, 1.6 L (1,598 cc) engine also equipped with Dual VVT-i and Valvematic. Output for this engine is rated at 132 hp (97 kW) at 6400 rpm and 118 lb·ft (160 N·m) of torque at 4400 rpm for the Avensis. Compression ratio has been increased to 10.7:1, red line is at 6600 rpm. Valvematic varies the intake valve lift between 1mm and 11mm according to load and RPM.
The Toyota 2ZR-FE is a DOHC, 16-valve, 1.8 L(1798 cc) engine also equipped with Dual VVT-i. This new engine is now replacing the 1ZZ-FE engine in most applications. Output for this engine is rated at 104 kW (140 hp) at 6000 rpm and 174 N·m (128 lb·ft) of torque at 4400 rpm for the Corolla, Matrix, and Vibe and 95 kW (128 hp) and 171 N·m (126 lb·ft) of torque in the Scion xD.
The Toyota 2ZR-FAE is a DOHC, 16-valve, 1.8 L (1797 cc) this engine adopts the Valvematic system. This all-new engine is progressively replacing the 1ZZ-FED and 2ZR-FE engine in most applications. Variants of this engine produce 104–110 kW (139–148 bhp) and 171–175 N·m (126–129 lbf·ft) of torque. Compression ratio is 10.5:1 and redline is at 6600 rpm. The engine consumes 5–10% less fuel than the 2ZR-FE depending on the application.
The Toyota 2ZR-FXE is a 1.8 L (1798 cc) Atkinson cycle variant of the 2ZR-FE. It has the same bore and stroke, but the compression ratio is increased to 13.0:1, and the inlet valve closing is retarded. The net result is that the engine has a greater effective expansion than compression. Output is producing 73 kW (98 hp) and 142 N·m (105 lbf·ft) of torque, paired with electric motor/generators in the hybrid drive system; together the engine and electric motors produce up to 100 kW (134 hp) and 207 N·m (153 lbf·ft)pm.
The Toyota 3ZR-FE is a 2.0 L (1,986cc) DOHC, 16-valve engine with Dual VVT-i.
The 3ZR-FAE is a 2.0 L (1,987cc) DOHC, 16-valve engine that was first used in 2007. It is Toyota's first engine with the Valvematic variable lift intake system.
A flex fuel version of the 3ZR-FE was released in March 2010 in Brazil with 153 PS (113 kW; 151 bhp) when running on ethanol.
Output for this engine is rated at 87 kW (117 hp) at 6000 rpm and 150 N·m of torque at 4400 rpm.
Specification is similar to 2ZR-FXE & a region-coded model due to various reasons.
The 1.6L and 1.8L ZR engines are built in Tianjin FAW Toyota Engine Co., Ltd. (TFTE) Plant No. 2, beginning in April 2007 and in the West Virginia Plant for Corolla's production in the United States and Canada.