Can`t choose between 603\606.
Can`t choose between 603\606.
Both om606 and om603 should have EGR but it can be blocked off. The only thing the computer controlled was the injection pump. if you use the mechanical pump off an om603 the om606 will run with out the sensors.
The om603 turbo also had a computer and airflow meter to adjust idle but that can be removed and the idle can be manually set