Hello. I realised last night that my horn doesn't seem to be working. My MOT is coming up in a few weeks and id like to know if my car will fail the MOT because of it? Have been looking at an AIR HORN (Novelty ones)...are these street legal or not? And one more thing, are there 2 horns on a Seat Leon as im sure when i first got my car the horn was loud, the horn before it broke was half the loudness 
