I think that this system operates similar to the BLU-Logic system which is also available from Toyota. The audio is broad-casted thru the front speakers when activated. I started looking into a blue-tooth car kit about 2 months ago and wanted something that would look and act as if it were a factory installed feature. After some searching on the Internet, I came across the Toyota BLU-Logic kit
http://www.toyota.ca/cgi-bin/WebObje...900020e%2ehtml who's average price on the net was about $180 US (P/N PT923-00090) for the 09 Corolla. I spoke to my local parts manager who's quoted me a price of about $200 CAN. When I when to place my order, the price not including installation came up to $164+tax CAN. I though that this was a deal considering the higher price on the Internet. Fortunately, they had the kit in stock but to my disappointment it was the kit mentioned in the first thread and not what I was after. I didn't want the stick-on interface module which would make the system more of an after-market add-on instead of OEM. When I questioned the manager about the difference, he stated that this was the only kit that they have been selling for quite sometime. I showed him the system I was interested in and he knew nothing about it, he then checked the p/n listed on the Internet and it was shown as discontinued. I then contacted Toyota Canada customer service and was provided with a different p/n (PT923-00094). I once again checked with the parts manager who confirmed it as a good number but the price was listed as $257+tax CAN. I decided to order it from my dealer instead of the Internet (US) because with the currency exchange/shipping/brokerage fees?/duty it would not be a great savings and if I had any problems, it would be easier to resolve. The BLU-Logic comes with a control module, harness, mike and interface switch (mounts in a spare switch knock-out). See link for installation
http://www.trdsparks.com/install/PT9...nstCorolla.pdf. The system mutes the head-unit if it's on and also uses both front speakers for the audio output. So far, I'm very happy with how it operates.