I have installed a WOLO "BADBOY" small two tone horn from harbor freight (39.99). It is easy to install (only one small horn) that replaces the tiny stock horn. The important part is getting a loud horn that needs no more than a 15 amp fuse. (The Leaf horn only comes with a puny 10 amp fuse, which I increased to a 15 amp fuse with no problems. I have had it in the car for 8 months, and is nice and loud. If it breaks, I will not replace it, and put in a stock electro-mechanical horn off of a Honda Odyssey (my other car) that is really loud and annoying. I like the Honda, but I am sure that many other brands of stock SUV or truck horns are loud. Those non-air compressor, electro-mechanic horns will last forever. Any questions about installing, please PM me.?