if you believe everything you hear then kiyani is hanged and pasha is under house arrest. you got my point???
properly maintained vehicle with scheduled change of lubricants & filters can outlast then what you HEAR from other people.
such gossip for Corolla engine head failure is traced back to Metrocab workshop mechanics who have no idea or interest in maintenance of vehicle engine. The simply focus on vehicle brakes and running engine which can pull car from airport to a destination and back generating cash.
I assure you domestically used Toyota Corolla engine (CNG fuel) head failure is not so common.