Noises problem
1999 BMW 528 Four Wheel Drive Automatic 127000 miles
----------------------------------------------------------------
WHEN DRIVING AND REVERSING SLOWLY ON THE ACCELARATOR, THERE ARE NOISES. I THINK IT MAY BE THE THROTTLE. IS THIS CORRECT AND HOW WOULD I FIX THIS PROBLEM.

I think you have a cyclone separator failing, this may be a bit too much for an occasional mechanic to attempt, I recommend seeking a knowledgeable BMW trained technician to perform this repair.

thank you once again for your prompt reply. my husband is a mechanic and has no idea what a cyclone seperator failing is. please advise

I will send a picture. Part# 11-61-7-501-566 It is part #1 in the diagram

thank you for your reply

You're welcome. Was it what was needed?

we hope so. my husband is taking car to bmw specialist this week. hope to know soon.

car has been checked out. the bmw spealist reckons it is the module. my husband thinks it may be the valve. any ideas what i should go with. also does this need to be fixed or is it an unnecessary expense.

What module was recommended? Did the tech state what this module does? And yes, you could certainly ignore this repair, however the noise that you are concerned about will still be there, and it is a distraction to say the least.

hi, sorry, its not the module. the bmw tech reckons its the throttle. can u advise if it is the throttle or the valve so i can order the part please.