Both the old Toyota Corolla (E platform) and Corona/Celica/Carina/Avensis (T platform) have been replaced by the MC. It was a part of Toyota's plan to cut costs, which included reduction of different car platforms.
Compared to other automakers, Toyota’s definition of "platform" differs. That is, it is less about shared common hardware and more about a shared development processes.[3]
The company revised and updated the MC as the Toyota New MC platform, debuting with the Toyota RAV4 (XA30) in 2005.[1] It was in turn replaced by the C platform with the fourth-generation Toyota Prius (XW50) in 2015, created under Toyota’s new development framework, the Toyota New Global Architecture (TNGA).[4]
The platform has three choices of floor height, which are low floor, medium floor, high floor. The low floor is used for middle and large size cars such as the Auris (E150) and Mark X ZiO, while the medium floor is used for SUVs such as the RAV4. The high floor or raised floor variation is mainly used by minivan with a flat floor structure, such as the Previa/Estima and Alphard/Vellfire.[5]