Could Porsche Cayenne manufactured in 01/03 be modified to have their PCM look like as if it natively supports XM (i.e. modify first generation PCM to support XM)? How much will it cost me? I live in CA. Thanks,
I was recently at the Brandywine Porsche dealership and they wanted over $1K to install XM into the PCM for a 2006 911 Cabrio. If it's a 1 hour install, the price they quoted seems high. I had XM installed in my 04 BMW 545i via an AUX port controlled by IDrive and the cost was ~ $250. What should I expect to pay to have XM via the PCM system?