The FAD quality seal is only awarded if all test criteria for the quality under application-specific conditions are permanently met concerning:

• Pollutant reduction
• Functionality under application-specific conditions
• Function-related secondary emissions
• Excessive fuel consumption
• Maintenance concept

Further information you find in the following document:
„Regulations for testing components and systems for exhaust aftertreatment (EGA) of diesel engine exhaust gases for obtaining the FAD quality seal (FAD-QS). Part II: Quality requirements to exhaust aftertreatment systems according to FAD-QS criteria.“