Toyota 1SZ-FE engine
The 1.0-liter Toyota 1SZ-FE engine was produced in Japan only for the Yaris model family from 1999 to 2005. The engine was equipped with VVT-i variable valve timing system only on the intake side, and the engine's timing mechanism was driven by a Morse chain. The SZ engine family also includes the 2SZ-FE and 3SZ-VE engines.