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      01-14-2019, 04:30 PM   #2
Yogi1974
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Drives: BMW 1 series 118i M Sport
Join Date: Sep 2018
Location: Nottinghamshire

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It could be a split in the Ariel wire which is actually mounted in the back window glass.
Mine failed, and the signal was lost every time I put the rear window heater on, then came on again when turned off. I had a new back window put in at BMW main dealer under my warranty.
But I still lose dab signal in certain places which bugs the hell out of me