Although most E23 engines were fuel-injected, two models (the 728 and 730) were available with a Solex four-barrel carburetor until 1979, when they were replaced by the fuel-injected 728i.
Хотя большинство двигателей E23 инжекторные, две модели (725 и 728) были доступны с четырёхкамерным карбюратором Solex(до 1979), пока их не заменили инжекторным 728i.