buy the following, they have prado diesel avaliable, it is avaliable in australia, and get someone professionally done for you http://www.unichip.net.au/diesel-results/toyota.html (scroll down for 2009 prado) In US,it is only for 600, plug and play, not sure if it fits australia model http://www.unichip.us/vehicle/vehicles/3506-2010-Toyota-Prado-D4D-Diesel-turbo Unichip is a famous product, and I have been using it in my car for few years now, and I like it, you can click my signature below for dyno graph Australia dealers are below http://www.unichip.net.au/dealers.html When it comes to chipping, get someone you trust to do it