I assume you're talking about the mirror; not the radio?depending on you familiarity with mazda and mechanic abilities. the hardest part is probably getting back together the right way. The forward LT. pillar cover is really tuff to get back on correctly. I know that most mazda dealers charger aprox. 120.00 installation, it could be worth it in the long run. To answer, its at least a 8 or better.