To our knowledge, AdBlue became mandatory in Australia as part of the Euro IV emissions standards, which came into effect in November 2005. These standards set limits on the emissions of nitrogen oxides (NOx), particulate matter (PM) and hydrocarbons (HC) from diesel engines. Since then, the emissions standards have become more stringent and AdBlue usage is mandatory for diesel engines to meet the current emission standards in Australia.
It’s important to note that the usage of AdBlue is mandated by emissions standards and its use helps to reduce emissions of nitrogen oxides (NOx), which is a benefit for the environment and the air quality in the long term. Therefore, it’s important to make sure that the vehicle’s AdBlue system is functioning properly and refill the AdBlue tank as soon as possible when low, to ensure the vehicle continues to operate normally and meet emissions regulations.