Just looking inside the factory installed oil filter that I removed from my 2014 825i. I noticed it has a spring inside, assuming it is either a pressure relief bypass or anti drain back valve. The filter I installed (JD AM107423) does not appear to have this. In the technical service manual it suggests to use the for mentioned type. Any idea why the newly installed filter would not be like the factory one....Is there a filter to replace the (107423) that would have this feature....Thanks JD
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