Originally Posted by crazy8ship
I just bought an 08 IS250 Tuesday. I need to transfer my XM Sirius to the Lexus but I guess I don't have the adapter. What is the best one to use now? Most of the threads I see are pretty old. My dash has the AM/Sat button.
I just installed SiriusXM in my wife's 08 IS250. It is a very easy task.
You will need:
1. SiriusXM - SXV200 tuner (about $50 with a 3 month trial subscription)
2. ISimple Gateway - ISTY12 (about $149)
3. Shark Fin Antenna Adapter, SFA12F - about $63 if you want to interface with the IS250 stock Sat Antenna
First - when you receive the ISimple Gateway go to the manufacturer website and download the latest firmware and then update firmware. I didn't do this on the initial install and was missing some XM channels - the firmware update fixed this.
Remove one battery cable from battery so as to prevent any arcing problems.
Remove the factory radio by (a) remove upper middle a/c-heating register above the radio - it takes a bit of prying but should pull straight out. You'll see two bolts holding in radio - remove them. Remove side trim at the bottom of the radio on the center consol - they will also just pull out and you'll see the two bolts at the bottom of the radio. Move shift lever to drive position
Pull radio out. Install ISimpleGateway using manufacturers instruction (plug in Sat tuner first) - the gateway interfaces with the stock radio very easily and is plug and play. Run shark fin adapter cable from tuner to rear of vehicle (I ran it under trim and through the package door). In trunk remove passenger side panels to reveal cables - the interface for the shark fin adapter will be wrapped in plastic - undo plastic and insert adapter (make sure you order the SFA12F adapter - I mistakenly ordered the 12m which is male.
Put everything back together, hook up battery and enjoy your SiriusXM
It took me about 1 hour to do everything