It’s also called an ICV and needs cleaned sometimes. Here’s a video:

https://m.youtube.com/watch?v=lVPV-XnmJyk


Also, an acronym guide:

https://www.scribd.com/doc/225868351...-Abbreviations

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2005 X5 4.4i SterlingGrau, Sport Package, DSP
Build 3/12/2005