Are there different sat nav antennas?  i mean i imagine they will be different for the different cars, but do they all work the same? 

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I pulled this one off an astra in the scrappers, not sure what radio it had as it was gone,  but the antenna has 3 connections... all those fakra types... so i presume it's got fm, dab and sat nav? 

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i pulled the antenna wires out best i could... was weird how they were all three together till the drivers seat,  then o