Mighty Car Mods has produced a cool video on how to properly pronounce Japanese car brand names in their native language.
When words are imported from one language to another often the pronunciation changes, just look at all the words of French origin in English that sound nothing like the original.
So too with automotive brands. In Australia Nissan is pronounced Niss-an, while the American version of Nee-san is closer to the Japanese original.
Brand names pronounced include Nissan, Subaru, Mitsubishi, Suzuki, Toyota, Mazda, Daihatsu, Honda and Lexus. The biggest difference is with Mazda, which is pronounced as Mat-su-da.
Source: Mighty Car Mods