Differential types/Code for 2005 1.8 Icon help

The differential on my 2005 1.8 icon 5spd 2.5 is slowly destroying itself, which i am lead to beleive is a fairly common problem!
I am told its an lsd and the code I have found on it is MA02 1 T5, the diff I have found to replace it, also of a 2005 5spd 1.8,  finishes in the code 1 ER.
My local ealer says there was only model of diff and the extra digits would be manufacture or date codes.
Would anyone know if this is correct before I go and try to get it fitted, to me it looks all correct but…
sorry if this is a repeated and common question.
cheers