here is a guide to fitting a new horn on a facelift Auris 13 plate
remove 2 clips and 1 bolt from grill
put your hands into bottom of grill and gently pull forward to unclip the grill
clips are arrowed in picture.
image with grill removed,remove upper cover to give better access and unbolt
the horn.
new horns are now fitted.
re-assemble in reverse.
i originally bought these for an aygo we had a few years ago they came off a rover 75
there's a high tone and a low tone horn ,the horns fitted have the plastic trumpet, you cant
see them as they are facing the radiator
i am sure people would take notice of these horns ,any car with high and low tone horns fitted will work
just make sure to take some wiring with the horn plugs as it makes installing so easy.
to connect to the original horn connector use a 15a male spade