Home >> Audi >> 2016 >> A3 TDI Prestige >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> GENERAL, TECHNICAL DATA (4-Cylinder TDI Common Rail 1.6L; 2.0L 4V Engine) -- (A3 SEDAN) >> 00 General, Technical Data >> Safety Precautions >> Safety Precautions When Working On SCR System >> Performing Reducing Agent RECIRCULATION