How often should the urea filter be replaced?
2 Answers
Urea filters should be replaced every 50,000 to 60,000 kilometers. Once the filter loses its filtering effect, impurities in the urea can cause system malfunctions. Automotive urea is a liquid used in SCR technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. Its composition is approximately 32% high-purity urea and 67% deionized water. All vehicles with diesel engines require urea. Diesel engine vehicles have urea nozzles in the exhaust pipe that spray urea solution to purify the exhaust. The urea nozzle is a wear-prone component that requires frequent replacement and cleaning. If low-quality urea is used or the urea filter is not replaced on time, it can easily lead to clogging of the urea nozzle.
The replacement interval for the urea filter is generally around 1 to 2 years or 100,000 kilometers, but it's best to refer to your vehicle's manual for specific recommendations. Its function is to filter impurities in the urea solution, preventing nozzle clogging and avoiding issues with the SCR system. Failure to replace it in time may trigger fault codes, affect emissions, reduce engine performance, and lead to higher repair costs. I often remind vehicle owners to regularly inspect the urea pump and pipes. If driving habits are aggressive or long-distance trips are frequent, the higher pressure can cause earlier wear. Environmental factors also play a role—in dusty areas or cold weather, the filter wears out faster, so checking every 80,000 kilometers is safer. Keep an eye on urea consumption and top it up when low. It's best to visit a professional shop to scan the system with a diagnostic tool to ensure everything is functioning properly.
