Emission Applications

2021 A4, A5

Engine & Fuel System

⁽¹⁾ Emission Control Systems & Devices

EGR Test No.

2.0L (122") Turbo DI

PCV, EVAP, TWC, FR, SPK, ⁽²⁾ HO2S, CEC, MIL, EVAP-CKV, EVAP-CPRV, EVAP-VC, SPK-CC

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⁽¹⁾	For quick reference, major emission control systems and devices are listed in bold type; components and other related devices are listed in light type.

⁽²⁾	Equipped with 2.