Are you sure its the same Iru? Iru can also be neccessary or the need of somthing as in
タクシーがいる
and with the kanji
タクシーが要る
meaning taxis are needed.
I have a question of my own - in regards to some japanese slang
what is チョベリバMK5
I know チョベリバ is like 最低 or 最悪 but i don't understand the reference to MK5, nor do i understand what MK5 is. Since an Otaku said is i'm assuming its a game or anime - but still i don't know why it is referenced.