Can I do a DE-Cat?

Hi Guys.
I want to know can i do a de-cat on my 2005 116i?

Im not sure where the 02 sensor sits,but if im not mistaken if a 02 senson sits infront of the CAT , can it be cut out without any engine light coming on?

Cause i know from my ex Fiesta ST , the 02 sensor sat behind the CAT.

Thanks
Jarryd