Home >> Audi >> 2016 >> A3 TDI Prestige >> Repair and Diagnosis >> Engine Mechanical >> Exhaust >> EXHAUST SYSTEM (4-Cylinder TDI Common Rail 1.6L; 2.0L 4V Engine) -- (A3 SEDAN) >> 26 Exhaust System >> Exhaust Gas RECIRCULATION >> Overview - Exhaust Gas RECIRCULATION >> EGR Overview >> EGR Cooler Switch-Over VALVEN345 1