How much does it cost to get an mp3 jack installed in my 2009 Nissan Altima?

I have a simple question. I just got a 2009 Nissan Altima 2.5s( I think that's what it is) and I want to play music from my iPhone. How much would it cost to get it installed and who would I go to to install it? Also, would they have to replace my whole radio display in order to install it?

Installation cost from $50.00 to $80.00, but this is something you can do your self
the iPod interface for nissan radios its easy to install this are plug and play

http://www.oemautosound.com/pc-237-166-usa-spec-pa15-nis-1999-2009-nissan-infiniti-to-ipod-interface-with-auxiliary.aspx

Well there are a few things.

I'm guessing the radio in the vehicle is stock. Being so I do not know if that radio has a jack in the back to attach a extension port to. Also I don't know if your radio has a aux port in the front of it.

If it had a jack port in the pack an extension port could be installed by a stereo shop for around $100.

If you have a AUX jack in the front of the radio all you need is a iPhone to aux jack cord.
https://www.google.com/...Y&bav=on.2, or.r_gc.r_pw.r_cp.r_qf.&fp=53302ec486f14efc&biw=1173&bih=789

If you don't have either then yes you would have to get a new radio installed that supports what you needs are.

HERE IS WHAT I WOULD SUGGEST:
FM transmitter
http://www.google.com/...e&bav=on.2, or.r_gc.r_pw.r_cp.r_qf.&biw=1173&bih=789&um=1&ie=UTF-8&tbm=shop&cid=11536173561141416896&sa=X&ei=aEwsUPuAMuSIygGj9oHoDQ&ved=0CLkBEPMCMAY

EDIT:
conejote_99 your did find something I did miss but the radio must have a SAT button to install this adapter…

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