You can use the F on a K box, but I cannot recommend to do so. If you do so, you also have to correct the variant coding (in your bin) as this does not match from F on K (but vice versa). Otherwise you will get an error of wrong ECU coding.
Why don't you use the K Box?
Hi
It is a friend of mine. He had a problem with rear O2-s. We have emission laws over here that do not allow dtc on these. He swapped them for new - Did not help. He swapped the entire harness - Nada. So he bought a used 551F box, but he missed that his oem is 551K.
"correct the variant coding (in your bin)" that means?
Is it the same procedure K = F?