Hi guys, new to the forum scene. i just recently got a 04 G35 coupe, and it came with just one key. i wanted to get a spare key for it. my question is, will a aftermarket key work? (ebay) and how do i sync up the new transponder?

thank you in advance for your time and help.

 

You can buy a blank key off eBay with a chip
But your going to have to get your original key and the new key reprogamed with a locksmith it cost me $40