Frustration erupted among 4WD enthusiasts at the Australian 4WD and Adventure Show in Perth, held from November 7 to 9, after several vehicles were issued defect notices while parked at the event.
Videos circulating online – and as seen below, posted to the dirtbornclothing TikTok page – show attendees returning to their cars to find yellow stickers on their windscreens. Defect notices are issued to vehicles deemed unroadworthy and must be inspected at an Authorised Inspection Station within a set timeframe. Police confirmed to Yahoo News that 11 defect notices were issued at the event.
What has particularly irked 4WD owners is that the action was clearly planned in response to the gathering, rather than random patrols. Industry experts have suggested that the move may make some punters hesitant to return to next year’s show – or similar events – out of concern their modified vehicles could be targeted.
Modified 4WDs are often under particular scrutiny because many aftermarket changes can affect roadworthiness. Police typically check lifted suspensions, oversized tyres, steering components, and heavy-duty modifications to ensure they don’t compromise vehicle stability or safety. Accessories such as bullbars, roof racks, winches, and aftermarket lights can also trigger notices if they are unsafe, improperly mounted, or non-compliant with local regulations.
Other common issues include worn brakes, corroded or damaged chassis components, and unroadworthy driveline parts, all of which can be exacerbated by off-road use or modifications. Essentially, any change that affects a vehicle’s geometry, stability, or overall safety can attract a defect notice, making it essential for owners of modified 4x4s to ensure their vehicles meet legal and safety standards before heading to public events or onto the road.




