I think it's advanced or autozone that lend/rent tools. Your local independent parts store might as well. If you can find a kit for less that 13 bucks like Ricky claimed I know which route I would take lol
Oh sometimes cars are funny like that everything will go smooth on one side you get to the other and you find a surprise I would give yourself more credit and give it a go.

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2006 X5 4.4i