That is the factory parts catalogue, a copy of which is available on REALOEM. Bear in mind that REALOEM has limited functionality though as it does not include the search and cross reference search of parts, parts usage per model and listing of superceeded parts. These functions ara available in the genuine BMW parts catalogue.I can appreciate that, but still the information must come from a source. I would like to know what that source is. I have already e-mailed BmW germany in the hopes that they will be able to provide this information.