EXHAUST GAS NOX SENSOR /BEFORE CATALYTIC CONVERTER/ RVI C/D/T/K// / VOLVO FH/FM/FL/FE EURO6; ATTENTION!!! A CONDITION FOR ACCEPTANCE OF THE NOX SENSOR FOR CONSIDERATION OF THE COMPLAINT IS THAT A PRINTOUT WITH ERROR CODES FROM THE DIAGNOSTIC COMPUTER AND CONFIRMATION OF CLEANING OF THE SCR SYSTEM IS ATTACHED.