Well here is the problem, last week i was driving and suddenly all the power of my 525d (2004)was gone, i could still drive but the car didn't accelerate like it normally does. Sorry for my english but im from belgium. So i stop the car, start it again and still no full power. I leave the car there and come back after 4hours and it drives normal again, turbo working like it should do. The day after i drive the car again, turbo works again but then after 10minutes, again a loss of power. So, when the engine is cold everything works fine but once it gets to its normal operating temperature the turbo stops. But i never get a fault code on the dashboard.

Today i went to a friend who has got the software to read faultcodes and there were 2 faults, the first one that says there isnt enough pressure in the turbo and the second one that there was something with the EGR valve. What does this mean? That my turbo is broke or could it be something else?
Anyone had the same experience?

 

check all of your vacuum lines controlling the turbo first. They are a known issue to fail. There is a good write up somewhere on here checking them and replacing them.

 

It could be something else, like a stuck or malfunctioning waste gate. Are you hearing it spool at all (high pitched whine)when you accelerate?