Hello all new to this site and to mondeo's.

I currently own at '98 ST24 and need to replace the bank 1 precat lambda sensor. Is there a difference in the bank 1 from bank 2 sensors? I ask this question because when speaking to a supplier he asked what length of cable I needed as there are 2 different ones. Now forgive me if I sound stupid but I presume that both the precat ones would be the same only the postcat would be different?

Any help would be great thanks