Modern diesel and petrol engines route a controlled portion of exhaust gas back into the intake manifold to lower peak combustion temperatures and reduce nitrogen oxide emissions — and the EGR valve is the electromechanical gate that regulates that flow precisely. Over tens of thousands of miles, soot deposits from combustion build up on the valve stem and body, gradually restricting movement until the valve sticks open, stays shut, or responds sluggishly to the ECU's duty-cycle signals. A stuck-open valve dilutes the intake charge so severely that rough idling, black smoke at light throttle, and a noticeable power deficit under load are all characteristic symptoms. Conversely, a valve seized closed tends to trigger a fault code for insufficient EGR flow and may raise NOx output above legal limits. Because each engine management system calibrates EGR flow against a specific valve geometry, flow characteristics, and position sensor output, matching the OE number is not optional — an incorrectly specified valve can produce continuous adaptations faults and erratic idle even if it physically bolts on. Pierburg manufactures a significant share of original-equipment EGR valves for VAG, Renault, and PSA engines, while Meat & Doria and Sidat cover a broad range of European diesel platforms with quality aftermarket equivalents.
Use the make-model-year-engine selector on this page to narrow the list to your specific variant, then cross-reference the OE number shown against the part number on your existing valve or against the dealer parts catalogue entry. EGR valves differ by flow orifice diameter, connector pinout, position sensor type, and cooler integration — even two valves that share a mounting flange can have incompatible sensor protocols, so relying on OE cross-references rather than physical appearance is essential.
An OEM valve is manufactured to the engine builder's specification, usually by tier-one suppliers such as Pierburg or Bosch, and carries the factory OE number. Quality aftermarket valves from established names like Meat & Doria or Sidat are engineered to the same flow and sensor specifications and fully cross-reference to the OE number. Lower-grade alternatives may replicate the mounting dimensions but use thinner coatings on valve seats, leading to faster soot adhesion and shorter service intervals, particularly on high-mileage diesels.
On most modern engines, yes — the ECU stores learned adaptations for EGR flow that reflect the old valve's characteristics. After fitting a new valve, an OBD adaptation reset using a compatible diagnostic tool clears those stored values and allows the ECU to relearn against the fresh component. Skipping this step can leave residual fault codes active, cause an unexpected idle quality for the first few drive cycles, or in some cases prevent the system from recognising that the fault has been rectified.
Rough idling and a lumpy throttle response at low engine speeds are the most common early signs, caused by the valve sticking partially open and diluting the intake with inert exhaust gas. Black or grey smoke at light throttle on a diesel, combined with a reduction in pull under load, reinforces the diagnosis. Fault codes P0400 through P0409 in the OBD memory directly reference EGR flow and position faults. In severe cases a seized valve can cause repeated failed starts on cold mornings.
Showing 100 of 12,108 EGR Valve OE numbers. Enter the OE on the main OE search to jump to any reference.
