This is easy...


there is this thing called "Google".




just google P17E9. a ton of hits (you have a transmssion problem)


Or P17E9 + BMW


or 'P17E9 site:bimmerfest.com'



(this gives all hits on bimmerfest, you can do the same for xoutpost.com, but BF will pull in more data from different models not necessarily Xs)




Finally, you should post in the specific subforum for your model.