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What is an SCR system ?

SCR - selective catalytic reduction -this system converts nitrogen oxides (NOx) to N2 and H2O. The NOx reduction reaction takes place with injecting AdBlue(DEF) into catalytic converter.

The system consists of the following elements:

  • Urea Reservoir (AdBlue-DEF)
  • heaters (preventing freezing of liquid during negative temperatures)
  • pump
  • Injector (located in the catalyst)
  • NOx sensor (located at the end of the SCR system)