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, many techs check or replace the PCV around the 100,000 km mark if there are driveability clues (oil usage, rough idle, or whistling).

Tech tip: if a parts site or generic scan tool tells someone to replace an “EGR valve” on a 2017 Impreza FB20D, that’s likely a universal listing or a mix‑up with turbo FA‑series engines (e.g., WRX) that do use cooled external EGR. The Impreza’s ECU doesn’t monitor an EGR system because there isn’t one, so genuine EGR‑flow codes shouldn’t appear. If a scanner shows a generic EGR menu, ignore it and look for real, model‑specific DTCs instead.

Technical sources referenced

• Subaru 2017MY Impreza Service Manual (STIS) — Emission Control and Engine sections: no EGR components listed for FB20D.
• Subaru FB/FA Engine Technical Training materials — NOx management on NA FB engines via internal EGR (Dual AVCS), not external EGR.
• Subaru OEM Parts Catalogue for 2017 Impreza (FB20D) — no EGR valve or EGR cooler listed.

FAQs

Does a 2017 Subaru Impreza have an EGR valve?
No. The FB20D 2.0‑litre engine in the 2017 Impreza uses internal EGR through Dual AVCS and has no separate EGR valve, pipework, or cooler. That’s why you won’t find an EGR item in the factory parts catalogue or service manual for this model.

Where is the EGR valve located on a 2017 Impreza?
It isn’t — there isn’t one fitted. If a guide shows an EGR valve on a Subaru, it’s usually for turbo FA‑series engines (like WRX) or older EJ engines, not the naturally aspirated FB20D in the 2017 Impreza.

Why does my scan tool list EGR tests on this car?
Many scan tools show a generic menu of tests and fault names. The 2017 Impreza’s ECU doesn’t monitor an external EGR system, so genuine EGR‑specific DTCs won’t be set. If you’re chasing rough running, look instead at PCV condition, intake cleanliness, vacuum leaks, MAF contamination, fuel quality, and up‑to‑date software.