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|3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.|
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Originally Posted by DCbmw2001
I recently purchased a 2001 BMW 325i with 66K miles. The car runs great and everything seems to be fine. However, I noticed that the check engine light came on couple of times before an oil change. However, after an oil change, the check engine light came on more frequently and a whining sound coming from oil-filter housing when the engine is turned on (i.e. when the engine is cold). But the noise goes away, whereas the check engine light is persistent.
My mechanic has so far changed the vacuum hose and the spark plugs. The code of the "check engine light" is usually states Bank 1 and Bank 2 problem. I also took it to BMW dealership and the tech there suggested changing the "oil separator". Being frustrated with this, I want to know whether it sounds ok to change the oil separator or is it another hoax?
I appreciate your input. Thanks!
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