Artiom is correct about forums and faults reported. I have mentioned before, how many cars of the cars actually have the problems? probably a small percentage. Look at the following link:    I am looking for the post which stated when each engine 1ZZ and AD engines had modifications that cured the oil burning/head gaskets issues. I think that the Mk3 Avensis AD engines were modified and there has been hardly been any big problems so far.