To avoid defect notices when using aftermarket lights in Australia, it’s crucial to ensure that all upgrades comply with ADR (Australian Design Rules) standards and are installed correctly. Start by choosing lights that are clearly ADR-approved or road-legal, and make sure they match your vehicle’s original specifications for beam pattern, brightness, and color. Proper installation is just as important—secure housings, correct wiring, and accurate headlight alignment prevent glare or poor visibility, which are common reasons for defect notices. Regularly inspect lights for damage, moisture, or burnt-out bulbs, and replace any faulty components promptly. By combining compliant products with careful installation and maintenance, you can enjoy aftermarket lighting without risking safety violations or inspection failures.