Hi,

I have a strange issue with my x5 e53 2006 3.0d. Recently i have done few repairs on my e53.

1. replaced all glow plugs + the module (brand new)
2. replaced Turbo Boost Pressure Solenoid Converter EGR Valve (brand ne)
3. replaced 3 other injectors becouse they were showing high values on BMW ISTA D (3.5 or even 4.0 (maximum allowed)
4. partially fixed the turbocharger and reprogrammed turbo module
edit:
5. disabled DPF via ECU

After all this fixes the car was ok for a while when suddenly i was feeling again a little bit of power loss and i thought it was the turbocharger again.
After visiting the shop they scanned the codes and they noticed

004B11 DDE: Regolatore silenziiosita
004B10 DDE: Regolatore silenziiosita

Here are the screenshots:

1. https://i.imgur.com/Qn57NdR.png
2. https://i.imgur.com/QFHHXUY.jpeg

Any help or suggestions what do i check next?

PS: car runs fine no idle issues