From what I understand, you need the Kia adapter to allow the radio to read the data from the iphone. I can't confirm this but I have asked the same question on the Kia Forum and from everything I have read, the adapter is necessary. Don't know why.
Read your Kia manual
46-51
Kia Rio was created in 2000.
HOW HEAVY IS A kIA Rio
Use your brain and read the instruction Use your brain and read the instruction
What size speakers are in a 2009 kia rio
Will a 1.6l engine from a 2006 kia rio with a Automatic Transmission bolt up to a 2005 kia rio with a Manual Transmission, and work with the wiring harness on the 2005?
yes it will, all the kia Rio gearboxs are the same up to the kia Rio 2006 models, but if you want to put a gear box in a kia Rio, it probably would be best to get it done professionally
The 2007 Kia Rio has 16 valves.
yes
The 2008 Kia Rio has 16 valves.
The 2003 Kia Rio has 16 valves.