I have both XM & Sirius in my '06 Passat and I want to use the factory pod on the car. One lead works for both XM & Sirius. Is it possible to use a splitter on the antenna so I don't have to have a second antenna on the car? I think Terk sells one ... I just wonder if it would work???

it is possible, but you will not get a perfect signal. If it is an OEM XM antenna, it will not pick up Sirius ground repeaters, and vice versa. Only satellite signals. Does your OEM satellite antenna have SMB or FARKA connectors? It looks like the Terk splitter I linked below is for FARKA connectors.

http://www.amazon.com/Terk-Satellite-Si ... B0002GOH42