If you’re bringing your vehicle into Australia, it’s your job to make sure it’s clean and doesn’t have anything that could cause a biosecurity risk. The Australian government is serious about stopping harmful pests, plants, and diseases from entering the country. When your vehicle arrives, it will be checked for biosecurity issues. Officers may inspect it, and if they find any contamination, your vehicle will need to be cleaned or treated at your cost. To avoid this, make sure your vehicle is clean and free from any contamination before you ship it. The Department of Agriculture and Water Resources lists contamination as including things like “live insects, seeds, soil, mud, animal feces, animal parts, and plant material such as straw, twigs, leaves, roots, and bark.”