I was wondering if anyone knew if the 2003 or 2004 ion ecotec engines were the same. I had the coil pack go out, found one on ebay seller doesn't know if it will fit.

 

Call to Saturn parts dept will settle this.
Parts search online should also help you sort out compatibility issues.

In all likelihood they are the same......

PS: beware used electrical parts unless you know where it came from and why it's for sale.....