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2015 X5M-Installed cabin air filters and engine air filter using BMW parts from FCP Euro. Next day, after two separate 30 minute drives I can smell what appears to be an electrical burning smell from outside the vehicle. No odor inside car. No odor from interior cabin air filter or fuse box. Slight burning smell odor from one of the new cabin air filters inside engine area. No performance issues. Any thoughts on source or similar experiences?
 

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Do you have anything read bmw codes? There's a "sniffer" sensor on passenger side outside cabin filter to check for bad incoming air. It's my understanding it runs at a high temp inside itself. If that's the source you would get a code for the sensor being bad. This is just a wild guess on my part. I don't know of any other reason for your smell. Good hunting
 
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