Level 1:

Can be recognised by the mounting flange on the front face and a yellow CO adjustment screw.


Level 6:

Can be recognised by the mounting flange on the front face (like the Level 1) and a white CO adjustment screw (Level 1 has a yellow one).


Level 8:

Can be recognised by not having mounting flanges and a green or red label with WD48.08.
The one with the green label and second code IAW048/01 is for the catalytic convertor (US83) model.
The one with the red label and second code IAW048/02 is for the non catalytic convertor (15/04) model.
It is uncertain if units/chips can be interchanged between red and green types/engines.


hth