dear,
i have 2 bmw x6 e71, 50i the 2 cars have the same problem the cars start normaly but after 15 min a check engine light goes on and the cars start chacking and engine do not work properly.
i took the first one (29000 Miles) to a work shop here first they change the 2 turbo and the water pump for the turbo and the problem still the same .
so the they removed the catalyser and nothing change.
on the third step they change all spark plugs and 4 injector with no good result.
lately i purshase the maxisys 908 pro and i start to check my car on it she gave me the following dtc
ramdom missfire
missfire injector 1
injector 3
injector 4
injector 6
injector 7
even some of this injector are new.
2 days ago this problem also start with my wife 2010 bmw x6 50i , when i diagnostic here car i came out with a missfire on injector 7 and injector 8 and 1 .