I get a loud 'fan' noise from the rear of my Galaxy 19.TDi 2003. It seems to be coming from the place that a fuel pump may normally be, inside and to the front of the rear nearside wheel. It sounds a little like an aircraft flying over at altitude. The noise slowly winds down when the engine is turned off, it takes about 30 seconds before slience so I don't think it could be the fuel pump. Not sure if this noise is normal, it can just be heard from the inside of the vehicle whilst running. It can certainly be heard from the outside while standing on tha pavement. Any help would be appreciated.