The exhaust system carries exhaust gases away from the engine, quiets them and cleans them. In this group you will find EGR valves, which route part of the exhaust back into the intake.
In this guide: EGR valves.
EGR valves
What it is: The EGR valve lets part of the exhaust back into the intake, lowering combustion temperature and nitrogen oxide emissions.
Where it is fitted: On the intake manifold or between the exhaust and intake manifolds.
Signs of wear: Rough idle, stalling, loss of power and a check engine light with P040x codes.
Did you know: The most common cause of EGR trouble is carbon buildup jamming the valve, especially on diesel engines.
Where to next
- Catalogue: exhaust system — choose your make, model and generation.
- Parts by VIN — we will check the fit for your car.
- Parts guide — other systems.
We sell aftermarket replacement parts, not genuine parts from vehicle manufacturers. Descriptions are general — check the fit for your vehicle by OEM number or VIN.