7 Ute and 4WD Mods That Get You DEFECTED in Australia (And the 3 That Are Legal)

📕 My honest car, ute & 4WD guides — buy the right one, then keep it alive 👉 https://aussiemechanicgreg.com Go and stand in front of your own ute and count what's bolted to it that didn't come from the factory. On most utes and 4WDs that's six or seven things — and almost nobody in that driveway can say how many are inside the rules. This is not a crackdown video and I say so in the first two minutes. It's what VSB 14, the ADRs and the state bulletins actually say about seven common modifications, what an inspector looks at, and what it costs to put right. Then the three things people believe are illegal that are not. What I cover: - Ride height: the 50mm figure is an AGGREGATE, and taller tyres count towards it - Why your state's number is the only one that governs you — 75mm, 100mm and 50mm all appear - Tyre diameter by CATEGORY: 50mm for an MC 4WD or NA/NB ute, only 15mm for an MA passenger car - The bullbar rule that rules out a whole practice: the bar has to be for YOUR model - Light bars: four lights max, symmetry about the centre line, and the Queensland/NSW split - GVM upgrades: pre-rego vs a post-rego certificate at $800-$1,800, and why it does NOT raise GCM - Roof load, and what a defect notice actually does: 14 days, a FULL inspection, plates at 28 days - The three that are legal — snorkels, a dual battery done properly, tint at your state's VLT FACT-CHECK: VSB 14, the National Code of Practice for Light Vehicle Construction and Modification, is federal but each state and territory adopts and administers it separately; VSB 14 requires ride-height increases above 50mm to be certified however achieved, aggregating suspension and tyre changes, and since January 2016 a 50mm lift on an ESC vehicle is a basic modification needing no certificate; 75mm combined is reported for some separate-chassis off-road categories, 100mm in the NT, 50mm in SA/WA/ACT/Tas, and published summaries disagree on how the 75mm splits; tyre diameter increase is capped by category at 50mm for MC 4WDs and NA/NB utes and 15mm for MA passenger cars, VSB 14 states soft-roaders are not MC, and the speedo must stay within ADR 18/03; bull bars must meet sections 1, 2 and 3.1 of AS 4876.1-2002, must not obscure lights, indicators or the plate, and on an airbag vehicle must be certified or designed for that model; ADR 13/00 permits four additional driving lights, an LED bar counts as one if all its LEDs operate together, and it must be symmetrical about the centre line and off when high beam is not operating; no ADR bans roof mounting, reported accepted in Queensland below the roof line on the front half and not roadworthy in NSW or SA; GVM upgrades always require certification, pre-registration Second Stage Manufacture or a post-registration certificate reported at $800-$1,800; ADR 80/04 made some older platforms ineligible pre-registration (the V8 79 Series LandCruiser); NSW has limited increases to the axle mass rating for vehicles already registered there; and it does not raise GCM; Victoria Police reportedly ran 1,200+ weighbridge operations in one year at about 23 per cent failure (overloading, not modifications); roof load follows the vehicle maker's rating, not the rack's, dynamic typically 50-100kg and static 150-300kg; police need only a reasonable belief a vehicle is unsafe to defect it, yellow generally means minor and red serious, and in WA a notice allows 14 days for a full inspection of all defects, not only those listed, plates seizable at 28 days; eleven defect notices were issued at the Australian 4WD and Adventure Show, South Perth, 7-9 November 2025, confirmed by WA Police, and no claim is made that enforcement is rising; insurers require non-factory modifications declared and ride-height, wheel and tyre changes disclosed, and an undeclared or non-compliant one can be grounds for refusing a claim; snorkels are legal uncertified if the airbox stays enclosed and nothing structural is cut, a dual battery is not a certified modification if mounted and fused properly, and tint limits are state-based at 35% minimum VLT front sides and 20% rear; costs are indicative and vary by state and engineer. DISCLAIMER: General information and my honest opinion — NOT legal, engineering, insurance or purchasing advice, and not advice about your specific vehicle. Modification rules are set state by state and they change; the figures here come from published federal and state material and from reported summaries that in places disagree with one another. Nobody named or described here — manufacturer, bar maker, brand, retailer, workshop, engineer, insurer or police force — is accused of any wrongdoing, and no claim is made about enforcement intent or any trend. Check your own state road authority's current vehicle standards material before you modify anything, have work certified by an approved engineer where required, and confirm your insurer's position in writing.