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Discussion Starter #1
Here's an odd one -- maybe someone has an answer.

I've never noticed this before, but when the radio (a BMW Business CD unit in the HK Stereo package) in my 2002 325 Ci is tuned to the AM band, I get strong interference whenever I turn the rear defogger on. The interference (loud crackling and distortion) appears and disappears immediately upon turning the defogger on, or switching it off. This doesn't happen if the radio is tuned into an FM band, only when tuned to the AM band.

Thoughts or solutions? Thanks.
 

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This is a known problem, search and you will find more info about this issue.

I do not recall off the top of my head the issue, but the radio uses the rear window defroster elements as an antenna.
 

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This is a known problem, search and you will find more info about this issue.

I do not recall off the top of my head the issue, but the radio uses the rear window defroster elements as an antenna.
Correct the vertical lines in the rear window are the radio antenna, dont know if theres some way to overcome this, but it rarely is an issue for me.
 

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