Sorry if it had already been discussed, and no offense / disrespect, but Zulfiqar Sb. What is the exact issue / problem with Mark X?
Its a RWD car (many cars are there with RWD and min. To no complain), its from Toyota, which is world renowned for reliability, then why people say that it has poor handling and stability, especially at high speeds? Or even at low speeds? Sudden braking, and there goes the car.
(Pardon my ignorance. I do not know about Mark X and RWD cars)