Yes, a 3.5 mm to 3.5 mm cord will be fine. As long as it's a stereo cord (don't get mono), I don't think brand matters. I run a radio shack brand cable myself. It couldn't have been more than $5.

I'm not trying to tell you to go Belkin, but I'm happy with it. The auto kit ($39.99) has a 3.5 mm output jack. Your Aux cable is ends with a 3.5 mm input. You'll be fine. Again, this is the way I go, others may run their stereo cable from the headphone jack (output) to the Aux input. If, like me, you want to charge/power your iPod in the car while playing it, I think the Belkin cable makes a lot of sense.

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Smiley

'03 X5 3.0