Quote:
Originally Posted by Dadhawk
I can't speak for the XM antenna, but yes the OEM GPS antenna is installed underneath the dash. Not sure what the "official" location for it is, but I installed mine based on the instructions just right of center as far forward as I could reach.
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To add:
In my Impreza I had both XM and Nav mounted above the center HVAC vents, in the dash.
It worked fine 99% of the time.