BMW Questions? Ask a BMW Repair Expert for Answers.
I am sorry that you have not been helped yet. I just came online and saw your question.
Ok, it would help to know the year, model and engine size of the BMW you are working on.
And if you can let me know what you have tested so far in relation to this fault code and results so that I am not duplicating anything already done
Sorry, I will need to opt out as I have no information on a 525D. If another expert does, they will post here in reply to you