Parts for your 2017 Subaru Exiga-Egr valve

2017 Subaru Exiga EGR Valve — Is It Fitted, and Does It Matter?

Short answer: the 2017 Subaru Exiga (often badged “Exiga Crossover 7” in Japan) with the 2.5‑litre FB25 petrol boxer does not use a conventional external EGR valve. That’s not a fault or a missing part — it’s simply how Subaru engineered this engine.

Technical references back this up. Subaru’s FB Engine technical training (2011MY FB series) states that the FB petrol engines manage “internal EGR” via dual AVCS (variable valve timing) rather than a standalone EGR valve and cooler. In addition, the Exiga Crossover 7/FB25 service information for the Emission Control section lists systems like the three‑way catalytic converter and secondary air injection, but no EGR valve. Subaru’s electronic parts catalogues for the FB25 Exiga likewise don’t show an EGR valve or EGR cooler assembly for this model/engine combination. By contrast, Subaru documents and parts listings that do include an external EGR system are typically for the EE20 diesel or certain FA/DIT turbo petrol engines — not the FB25 port‑injected NA engine used in the 2017 Exiga.

Why no EGR valve? Subaru’s FB25 reduces NOx and meets emissions targets by combining:

• Internal EGR through cam phasing (valve overlap) to recirculate a controlled amount of exhaust gas back into the cylinders without external plumbing.
• A three‑way catalytic converter tuned for stoichiometric fuelling, which is ideal on a port‑injected petrol.
• Secondary air injection for cold‑start emissions, plus tight ECU control of ignition and fuelling.

This strategy keeps the hardware simpler, avoids an extra hot-side cooler and valve that can coke up, and works a treat for a naturally aspirated, port‑injected engine focused on smooth drivability and reliability. It also means owners of a 2017 Exiga shouldn’t be upsold on “EGR cleaning” — there’s no external EGR valve to remove and scrub.

Got a used‑import Exiga and wondering if yours is different? If it’s the FB25 NA petrol, it follows the setup above. Only Exigas with different engines (for example, earlier turbo EJ variants or any diesel Subarus, which the Exiga wasn’t typically offered with) would have an external EGR system.

Popular questions

Does my 2017 Subaru Exiga have an EGR valve?

No — the 2017 Exiga with the FB25 petrol engine doesn’t use an external EGR valve. It relies on internal EGR via variable valve timing, plus a three‑way cat and secondary air injection to meet emissions requirements.

How does the Exiga control NOx without a traditional EGR valve?

By using AVCS cam timing to create controlled valve overlap (internal EGR), the engine dilutes the intake charge with a small amount of exhaust gas, lowering combustion temperature and NOx. The catalytic converter then does the heavy lifting once it’s up to temperature.

My mechanic recommended EGR cleaning — is that relevant?

Not for the 2017 Exiga FB25 petrol. There’s no external EGR valve or cooler to remove and clean. If they’re chasing rough idle or hesitation, have them check intake deposits, PCV operation, spark plugs/coils, and the secondary air system rather than an EGR valve that isn’t there.