Hi Max
I also have a BMW F10 525D with Twinturbo
I have big problems. The small turbo does not activate and no fault codes are stored on the car's computer
I have changed almost everything.
The turbo is new
All vacuum hoses have been replaced and all Pressure converters have also been replaced.
The EGR has been replaced with a new one
Particle filter has been cleaned
The car has had its latest software update
I want to burn that car, it drives me crazy.
Do you have any suggestions
