Why this site exists
modyourcar.com.au used to be a parts catalogue. The domain now publishes an independent planning guide for people who want to modify a light vehicle in Australia and still keep it registrable. That is a different job. A catalogue asks what you want to buy. A guide asks whether the finished car will still meet the Australian Design Rules that applied when it was built, the in-service standards of the state that issued the plates, and — where the change is significant — the technical clauses in Vehicle Standards Bulletin 14.
We do not sell parts, book workshops, certify vehicles or speak for a transport agency. We also do not invent ride-height millimetres, exhaust decibel limits, tint percentages or “what an inspector will let through”. Those figures, when they exist, live on primary pages published by the Commonwealth and by TfNSW, Transport Victoria, TMR Queensland and the other registration authorities. If a sentence here cannot be tied to one of those pages, it is framed as a process, not a measurement.
How Australian modification law is stacked
Three layers sit on top of each other. First, the Australian Design Rules set the national standards a vehicle had to meet to enter the market. Second, VSB 14 — the National Code of Practice for Light Vehicle Construction and Modification — tells modifiers and individually constructed-vehicle builders how to keep or restore that compliance when they change the car. Third, each state and territory writes the administrative rules: who may sign, which forms to lodge, what a roadworthy or safety inspection looks for, and when a modification plate is required.
The Commonwealth is explicit that VSB 14 is the technical code, not the counter service. Fees, inspection bookings, the date of manufacture used for an individually constructed vehicle, and the list of accepted signatories are local. That is why a build that is routine in one jurisdiction can stall in another even when the same VSB 14 section applies. Start with the national bulletin, then open the page for the state on the state rules hub.
What counts as a modification
A modification is any departure from the vehicle as certified. Some departures are listed by jurisdictions as approved or able to proceed without certification — a like-for-like replacement, a radio that does not cut structure, a towbar that meets the cited Australian Standard. Transport Victoria publishes a current list of approved modifications for that purpose. Other states publish their own wording. Do not treat one state’s list as a national permission slip.
Work that changes structure, suspension geometry, engine family, emissions equipment, lighting type, seating, or the description printed on the registration certificate is where VSB 14’s certified-modification codes usually appear. That is the point to involve a recognised vehicle engineer, approved person or the scheme your state names. Guessing from a social-media build thread is how cars lose plates.
How to use the hubs
If you are still deciding whether a job is legal at all, read legal modifications and the VSB 14 guide. If you already know the state, open that jurisdiction on the state rules map. If the parts are performance hardware, start at performance and the exhaust or engine-swap guides. Wheels, tyres, springs and coilovers live together on wheels and suspension because inspectors treat them as one system. Lighting conversions, driving lamps and cabin audio are on audio and lighting.
The guides index holds the long articles — each written to stand alone for citation. The blog holds shorter explainers. About states what this publisher is and is not. Contact is an editorial inbox, not a booking desk.
What we refuse to invent
This rebuild does not republish the old shop’s prices, testimonial quotes, staff names or “girls of” gallery. It does not rank workshops, engineers or wheel brands. It does not invent events, opening hours or statistics. Where a heritage URL still exists as a clean path — history, privacy, the directory, a handful of news URLs — the body is newly written. Messy product and category addresses 301 to the hub that now covers the topic. Unknown addresses 404 with the site footer.
If you need a number — a clearance, a light output, a tint category, a noise method — open the primary instrument and read the clause. If the clause is silent, ask the registration authority or a signatory they recognise. That is slower than a forum, and it is the only process that survives an inspection.
A note on the parked years
For a stretch the domain did not publish useful guidance. Searchers who still held a backlink landed on a parked page or a decaying catalogue. This rebuild is the opposite of that: every IA hub has a newly written body, every messy product URL has one exact 301, and unknown addresses 404 with the same footer you see on a live article. If you arrived from an old coilover or exhaust SKU, the hub you landed on is the planning page that replaced the cart.
We also retired the parts of the archive that cannot be rewritten in good faith — named testimonials, staff profiles, and gallery paths that treated people as merchandise. Those URLs redirect home or to about. They are not “content opportunities”.
How to spend the first hour
Open VSB 14. Download the preface, the introduction, and the section that names your system. Open the state rules article for the plates on the car. Write one sentence that describes the finished vehicle, not the part you want to buy. If that sentence changes the engine number, the ride height, the lamp type or the exhaust path, you are already past a catalogue decision and into a compliance decision. That is the hour that saves the build.