The hazards of using inferior automotive urea solution include reducing the conversion efficiency of nitrogen oxides, damaging the vehicle's after-treatment system, clogging key components, affecting vehicle power performance, increasing maintenance costs, causing environmental problems, weakening the activity of SCR catalysts, clogging the automotive urea injection system, increasing exhaust resistance, reducing engine performance, clogging the exhaust pipe, damaging the engine, exhaust emissions not meeting standards, damaging the vehicle's catalyst, damaging the nozzle, damaging the metering pump, and crystallization leading to "urinary stones."‌

The hazards of using inferior automotive urea solution are mainly reflected in the following aspects:

1. Reduce the conversion efficiency of nitrogen oxides: Inferior urea solution may use raw materials that do not meet the standards, such as ordinary water instead of deionized water, or agricultural urea instead of automotive urea, resulting in reduced conversion efficiency of nitrogen oxides and affecting vehicle emission performance.
2. Damage to vehicle post-treatment system: Long-term use of inferior urea may cause damage to the vehicle post-treatment system, cause serious mechanical failures, and even cause the engine to be scrapped, causing huge economic losses to the owner
3. Blockage of key components: Insoluble impurities that may be contained in inferior urea will block key components such as filters, delivery pipes and nozzles, seriously affecting the normal operation of the SCR system
4. Impact on vehicle power performance: Impurity particles in inferior urea may block the automotive urea injection system, especially the nozzle, affecting the vehicle's power performance
5. Increase maintenance costs: Long-term use of inferior urea will increase maintenance costs and may even cause more serious Serious environmental problems
6. Weakened SCR catalyst activity: Impurities in inferior urea can quickly weaken the activity of SCR catalyst, or even poison it and make it ineffective
7. Damaged vehicle catalyst: Unqualified urea products have great damage to the car's catalyst. Long-term use will cause catalyst poisoning in the ceramic carrier in the muffler, reduce conversion efficiency, OBD emissions exceed the standard, and the later maintenance cost is very high
8. Damaged nozzle: Impurity particles may block the urea nozzle, especially the air-assisted nozzle cannot be cleared after being blocked and must be replaced
9. Damaged metering pump: Unqualified urea will cause abnormal wear or blockage of the metering pump, resulting in poor work or direct damage to the metering pump
10. Crystallization leads to "urinary tract stones": Inferior urea crystals may cause "urinary tract stones", that is, the deposition and crystallization of urea particles in the SCR system

In summary, the use of inferior DEF(AdBlue®) has a great negative impact on the performance and environmental protection of the vehicle, so it is crucial to choose qualified automotive urea.