Lexus RX engines – Timing belt or chain?

Generations

Lexus RX (AL20) 4th generation (2015-)

Lexus RX (AL10) 3th generation (2008 – 2015)

Lexus RX (XU30) 2th generation (2003 – 2008)

Lexus RX (XU10) 1th generation (1998 – 2003)

Related: Lexus / all car manufacturer