The US version used L - Jetronic from 1978 until mid-1981 , changing over to Motronic fuel injection in June of that year .
In the E24 633CSi , it uses Bosch L - Jetronic fuel injection .
The US version used Jetronic     from 1978 until mid-1981 , changing over to Motronic fuel injection in June of that year .
In the E24 633CSi , it uses Bosch L - Jetronic fuel injection .