Short answer: in Australia, a basic OBD/dyno tune for a stock petrol or diesel is around $400–$1,000 AUD. A custom ECU remap with dyno time typically lands between $800 and $1,800, while high-performance or turbo setups can push $1,500–$3,000. Piggyback or standalone ECU hardware with install and tune can be $2,000–$5,000+, and extra dyno time often bills at $200–$400 per hour. Supporting mods—intake, exhaust, intercooler and plugs—can add $800–$2,500 if you want gains that actually stick.
Budget for a post-tune service, better fuel, and tell your insurer (unless you enjoy awkward phone calls). Also check emissions and roadworthy rules, because “it felt faster” won’t charm the tester. Prices vary by car, tuner reputation and your appetite for shiny bits, but those ranges will keep you on the right side of surprise.
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