Parts for your 2007 Subaru Impreza-Egr valve

2007 Subaru Impreza EGR Valve — Is It Fitted?

For the 2007 Subaru Impreza, an external EGR (exhaust gas recirculation) valve isn’t part of the emissions setup on the common EJ-series engines used that year (EJ20/EJ204, EJ253, EJ255/257). Factory documentation and parts catalogues for MY2007 show no stand-alone EGR valve or EGR cooler assembly on these engines. That means an “egr-valve” isn’t relevant to normal servicing on a 2007 Subaru Impreza in Australia or New Zealand.

Why no EGR? Subaru met the 2007 emissions targets with a mix of engine strategies and hardware that made a separate EGR valve unnecessary. The EJ engines rely on variable valve timing (AVCS on many variants) that allows a degree of internal EGR, efficient three-way catalytic converters, oxygen sensor feedback, precise fuel and spark control, and, on some turbo models, a secondary air injection system for cold-start emissions. Together, those systems handle NOx control and combustion stability without the complexity of an external EGR circuit.

It’s worth noting a couple of edge cases: earlier EJ25 engines in some markets (pre-mid-2000s) did use EGR, and Subaru later brought EGR back on the FB-series engines (for example, many 2012-on models) with a cooled EGR module to further improve efficiency. But across the 2007 Impreza range, an external EGR valve simply isn’t there. If in doubt, a quick check of a VIN-specific parts catalogue or the under-bonnet emissions label will confirm it.

What they do instead:

• AVCS/internal EGR effect via valve timing for combustion temp management
• High-efficiency catalytic converters and tight closed-loop fueling
• EVAP and PCV systems for vapour and crankcase control
• Secondary air injection on some turbo variants (not the same as EGR)

Technical references enthusiasts and technicians use for this conclusion include: the Subaru Factory Service Manual for MY2007 Impreza (Engine/Emission Control sections), Subaru’s official service and parts catalogues (STIS), and Subaru training materials for the FB-series noting the later adoption of cooled EGR. Those sources list emission components per engine and show no external EGR valve on 2007 EJ-powered Imprezas.

Popular questions about a 2007 Subaru Impreza EGR valve

How can someone tell if their 2007 Impreza has an EGR valve?
On EJ engines from 2007, there’s no EGR pipe or valve body linking the exhaust to the intake manifold. Under the bonnet, they won’t find a metal EGR cooler or a diaphragm/solenoid assembly near the throttle body. A VIN check against a Subaru parts catalogue will also show no listing for an EGR valve on 2007 Impreza variants.

Why do later Subarus have EGR when the 2007 doesn’t?
Later FB-series engines reintroduced a cooled EGR system to squeeze more fuel economy and reduce combustion temperatures under certain loads. The 2007 EJ engines achieved emissions compliance using internal strategies (like valve timing) and catalysts, so a separate EGR system wasn’t required at the time.

Is the secondary air injection on some 2007 WRX models the same as EGR?
No. Secondary air injection pumps fresh air into the exhaust during cold starts to light off the catalytic converter faster. EGR recirculates a small amount of exhaust back into the intake to control NOx under warm running. Different purpose, different hardware.