Thinking about modifying your car?
Describe your vehicle and what you want to do — our AI will find the specific rules and requirements that apply.
Covers light and heavy vehicles across all Australian states
Up-to-date
Regulations
...
Engineers
Free
For Consumers
Already know what you need? Find an engineer directly →
Describe your vehicle and modification
Include as much detail as possible — vehicle make, model, year, what modification you want, and where the vehicle is registered.
How It Works
Describe Your Situation
Tell us about your vehicle and what modification you're planning or have done.
Get AI Guidance
Our AI searches official regulations and tells you exactly what codes and requirements apply.
Connect with an Engineer
When you're ready, find a qualified engineer near you or have one contact you directly.
Frequently Asked Questions
In Australia, significant modifications typically need engineering certification. This includes suspension lifts over 50mm, engine swaps, major brake upgrades, roll cages, and structural changes. Minor mods like exhaust systems, wheels within certain specs, and standard replacement parts usually don't. Rules vary by state, so use our chat to get specific guidance.
Yes! Mod Check is completely free for vehicle owners. No sign-up required. We built this to help everyday car owners understand their modification options before visiting a professional. If you need official certification, we can help you find a qualified engineer near you.
Simply enter your vehicle details, select the type of modification you're interested in, and start chatting. Our AI has been trained on Australian Design Rules (ADRs), National Codes of Practice (NCOPs), and other vehicle standards. It will provide guidance based on official documents.
No, Mod Check is an information resource only. For official certification, you need to consult a qualified vehicle engineer. However, we can help you understand what might be required and connect you with engineers in your area through our Find an Engineer feature, or you can leave your details and we will have an engineer who would like to help you contact you.
Use our "Find an Engineer" feature to locate qualified vehicle engineers in your area. You can filter by the type of modification you need help with, as engineers are accredited for specific modification categories.
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