The weather feature was added in 2010 along with the GEN6 NAV system. XM became standard in 2010 and was paired with weather/traffic updates at that time.
If memory serves me correct, you can only add XM OR the Vias ipod interface on the pre-10 models. They both use the same port on the back of the radio so it's one or the other.You can still add XM to your vehicle and it will interface with your unit. Also you can update your Ipod connect to the new unit in about 5 minutes and 30 bucks from VIAS technologies. It changes the charging output to 5v vs 3v so your Iphone will now charge.
Andy
Well I'm not sure how but on my 08 I have both. The XM adaptor was already installed in the car when I purchased and I had the dealer install the Vias ipod and they both work just fine. I have no idea how it hooks together though as I've never looked, but it is possible to have both.If memory serves me correct, you can only add XM OR the Vias ipod interface on the pre-10 models. They both use the same port on the back of the radio so it's one or the other.
My dealer told me the same thing, that you could have the VAIS Tech iPod adapter and XM. However with the Lexus iPod adapter you could only have iPod and not XM.Well I'm not sure how but on my 08 I have both. The XM adaptor was already installed in the car when I purchased and I had the dealer install the Vias ipod and they both work just fine. I have no idea how it hooks together though as I've never looked, but it is possible to have both.