Originally Posted by Dutch2005
We do a ton of Sat radio hard wires at my shop.
For the first 3 months I worked there, I followed the practice of the other installers and always mounted them on the outside of the vehicle until customers started coming back complaining of "no signal" problems.
It turns out that Sirus and XM'* antennas are not as weather tight as they originally thought.
Now we do all of our installs on the dash without any comebacks.
That'* exactly how our bay is also. If the customer want'* it outside, we will do it. Otherwise, I recommend to them mounting it on the inside, so the antenna won't sucomb to the weather, and die. I usually just place it right at the corner where the A-pillar meets the dash. Haven't seen a single one die yet!