Why Do Vehicles Use Urea and How to Use It?

[VanMiranda]

Vehicles use urea primarily to reduce harmful nitrogen oxides in exhaust gases into nitrogen and water. When using and carrying urea solution, it is important to prevent contamination and leakage. Avoid allowing impurities to enter the solution and the urea tank during use.

[DiPatrick]

I've been driving a diesel vehicle for a while. Automotive urea is primarily used to treat exhaust emissions, reducing harmful nitrogen oxide pollution in the environment. In the SCR system, urea is liquefied into ammonia, which reacts with exhaust gases to convert them into harmless substances, meeting regulatory requirements and avoiding fines. How to use it? It's simple—most vehicles have a blue filler port under the hood or near the spare tire. Periodically refill it with dedicated urea fluid (like the AdBlue brand), and avoid using tap water or contaminated liquids to prevent nozzle clogging. Refill frequency depends on driving habits: urban short trips might require a top-up every 5,000 km, while long-distance driving warrants more frequent checks of dashboard warnings. Don’t forget to clean the nozzle after refilling, as leaks can corrode components. Developing this habit can save on repair costs and protect the air. Beginners are advised to refer to the user manual for guidance.