Parts for your 2017 Subaru Impreza-Egr valve

2017 Subaru Impreza EGR valve — is it fitted, and what to know

Short answer: the 2017 Subaru Impreza (FB20D 2.0‑litre direct‑injected petrol) does not use an external Exhaust Gas Recirculation (EGR) valve. Subaru’s own technical literature for the 2017MY Impreza shows no EGR valve, pipework, or EGR cooler in the engine or emissions schematics, and their engine training material explains that NOx control on naturally aspirated FB engines is handled by “internal EGR” via Dual AVCS (variable valve timing), not by a separate EGR assembly. OEM parts catalogues for the 2017 Impreza likewise list no EGR valve for the FB20D.

Why it isn’t used on this model: the FB20D manages combustion temperatures and emissions through a mix of dual AVCS (creating controlled valve overlap for internal EGR), precise direct fuel injection, a three‑way catalytic converter, and tight mixture control with wide‑range oxygen sensing. This strategy meets LEV3/Euro‑style emissions without the complexity, soot loading, and coolant/soot management issues that come with a conventional external EGR valve and cooler. Fewer add‑on bits under the bonnet, fewer vacuum and coolant joints, and one less item to service — nice.

• What it does have instead: Dual AVCS (internal EGR effect), PCV system, EVAP purge control, air/fuel (wideband) and O2 sensors, and a three‑way catalytic converter.

What owners should do: because there’s no EGR valve to clean or replace, “EGR servicing” isn’t on the checklist for this car. For smooth running, keep to quality petrol, change oil on time, and consider periodic throttle body and intake clean if idle gets a bit lumpy. With direct injection, light intake valve deposits can build up over higher kilometres — good oil, proper warm‑ups, and the odd open‑road run help. Keep the PCV valve and hoses healthy