Few

I have a 2005 ES330 which is "Satelite ready" or pay dealer $750. to make it work for Sirius. I called Sirius and they said the "SIR-PNR1" kit would work on my car with its Pioneer radio (and nav). I purchased the kit on ebay for about $80 and took it to the local radio shop to have it installed. The owner said that the kit would only work on radios with the standard pioneer "IP-bus" and the Lexus did not have that type connection. Is he right???? I'm still trying to find out.