cd player

[lkkc]

how easy is it to change the cassette radio player

to a cd player in a nissan almera year 2000 x reg

[depressedmgl]

It really is dead easy if the present radio cassette is standard size.  A new one will just slot in.  Some car manufacturers started making their in car entertainment systems unique to particular models, this helps reduce theft - if you steal a radio which will only fit one model of car then selling it on is difficult.  So it comes down to the model of car.