2005 Mazda 3 4sp auto tcm info

[Willjo422]

Im wondering about my tcm in my 05 Mazda 3 hatch 2.3L 4sp auto I was looking to replace it with a refurbished one from the guy on eBay everyone on here talks about but was told that my 05 3 might not have a tcm. Can anyone help me with that? Does my 3 have a tcm if so where and can other year Mazda 3 tcms work with my car? Thanks