The following model codes have been used by Toyota. The letters of the model code is found by combining the letters of the engine code with the platform code. If the engine code and the platform code have two letters each, the middle letter is computed according to this formula:[1][2]
For vehicles equipped with the Dynamic Force engine series, the model code system is slightly changed as referred by the table below.
^Tudose, Sergiu (2019-04-24). "Toyota Mark X Final Edition Is The End Of The Road For Iconic JDM Sports Sedan". Carscoops. US. Retrieved 2019-04-26.
^Vanderhorst, Cam (2019-04-25). "Toyota Bids Farewell To A Sedan It's Been Selling Since 1968". Motor1. US. Retrieved 2019-04-26.
^"HP10 アクア プロジェクターヘッドランプ". クリアワールド Product (in Japanese). Retrieved 2021-11-19.
^ a bEugenio (April 2022). "Toyota. Clean air / cabin filter catalog". toyota-club.net. Archived from the original on 2022-06-29. Retrieved 2023-11-04.
^"TOYOTA - Application For Certification - Part 1 - 2024 Model Year" (PDF). US: Environmental Protection Agency. p. 12-RTYXT02.4P33-1. TAUH15L (TX 500h AWD)
^"TOYOTA - Application For Certification - Part 1 - 2024 Model Year" (PDF). US: Environmental Protection Agency. p. 12-RTYXT02.4P3P-3. TAUA10L (TX 350), TAUA15L (TX 350 AWD)