Discovery 2 (D2) Purge Valve Replacement Part

If you are having the occasional P0440 code thrown (read with an OBD2 reader), sometimes after tens or hundreds of miles of running, then there are usually two possible culprits.  The gas cap seal (or cap itself) or the purge valve (left side of engine, above the rocker cover).

The original Land Rover part is nearly $200, aftermarket ones are half that.  However, the Hyundai 28910-22040 is a direct fit in terms of mounting and connection (plugs straight in).  Make sure you put it in the right way (same as before), but there is an arrow on the body if you can't remember which way it was.  It is slightly different in that the filter is separate on the end (although supplied as one part).  This part can be found for less than $20.  Okay, so iy says "Hyundai" rather than "Bosch", but I can live with that!

Also check the surrounding hoses (for example where the rubber hose makes a "T" into the intake hose) to ensure there are no leaks.