Parts for your 2017 Haval H6-Egr valve

2017 Haval H6 EGR valve — is it fitted or relevant?

For Australian and New Zealand–spec 2017 Haval H6 models with the 2.0‑litre turbo petrol (GW4C20/GW4C20A), an external EGR valve isn’t fitted and isn’t a service item. Factory workshop diagrams for the AU/NZ petrol engine do not list an EGR valve or EGR cooler, and the Haval/Great Wall electronic parts catalogue for the same VIN ranges shows no EGR assembly on these petrol variants. Petrol emissions compliance for this model is achieved via closed‑loop control with a three‑way catalytic converter and variable valve timing, rather than an external EGR circuit. This aligns with common OEM practice under Euro 5/ADR 79 for spark‑ignition engines, where valve timing is used to retain exhaust residuals (“internal EGR”) without a separate EGR valve.

Why it isn’t used on the AU/NZ 2017 H6 petrol: modern turbo petrol engines typically run at or near stoichiometric fuel mixture so the catalytic converter can handle NOx efficiently. Using cam phasing to keep a touch of exhaust gas in‑cylinder reduces pumping losses and tames knock without the complexity and soot load of an external EGR system. That keeps drivability sharp, packaging simple under the bonnet, and servicing costs down. External EGR is far more common on diesels because they operate lean most of the time, where a three‑way cat can’t reduce NOx on its own.

There are overseas H6 variants (notably the 2.0‑litre turbo diesel, engine code GW4D20) that do use an EGR valve with an EGR cooler and a DPF. If someone’s H6 is a special‑import diesel, it may indeed have EGR. A quick check: look for an EGR cooler and valve assembly plumbed between the exhaust and intake near the bulkhead, or read the under‑bonnet emissions label for “EGR/DPF”.

• What to service instead on the AU/NZ 2.0T petrol: PCV/engine breather hardware, throttle body cleanliness, intake valve deposits (common on GDI, consider walnut blasting at higher kilometres), oxygen sensors, and catalytic converter efficiency.
• Software updates and quality fuel help minimise intake coking and keep emissions gear happy.

Technical references considered: Haval H6 factory workshop/service information for GW4C20 (AU/NZ), Great Wall Motors electronic parts catalogue (EPC) component listings for 2017 H6 petrol vs diesel, and standard Euro 5/ADR 79 petrol strategies documented in OEM training texts and SAE literature on SI engines using variable valve timing for residual gas control.

Popular questions

Does a 2017 Haval H6 in Australia or New Zealand have an EGR valve?
For the AU/NZ‑spec 2.0‑litre turbo petrol, no — there’s no external EGR valve to replace or service. Emissions are handled by the three‑way cat and clever cam timing. If it’s a special‑import diesel H6, that setup usually includes EGR and a DPF.

How does the 2017 H6 petrol control emissions without EGR?
It runs a stoichiometric air‑fuel mix with oxygen sensors and a three‑way catalytic converter. Variable valve timing retains a small amount of exhaust gas in‑cylinder (internal EGR) to reduce NOx and pumping losses, doing the emissions job without an external valve.

How can someone tell if their H6 actually has EGR?
Check the under‑bonnet emissions label and look for an EGR cooler and valve plumbed between the exhaust manifold and intake. Petrol AU/NZ cars won’t have these parts. Diesel variants typically will, along with DPF hardware and associated plumbing.