[_N54]

Hey guys,

I'm a bit twisted on this fault code. I was losing coolant and it was the obvious EGR cooler. I also had a broken engine thermostat. I purchased a good used EGR cooler (apparently it was good) and replaced the thermostat at the same time. I still have this fault code returning. When i look at my old EGR cooler i do see where it was seeping coolant through the weld/crack. The guy also sent me the solenoid so i swapped that in and replaced the vacuum lines and I'm not sure what needs to be done to clear this fault code. The used EGR cooler spring and everything looks to be in better condition then what i took off my car.

I can't recall if the 335d M57 has a EGR thermostat? I don't think i saw one the other day..

[Drews2k]

Originally Posted by ///S58

Hey guys,

I'm a bit twisted on this fault code. I was losing coolant and it was the obvious EGR cooler. I also had a broken engine thermostat. I purchased a good used EGR cooler (apparently it was good) and replaced the thermostat at the same time. I still have this fault code returning. When i look at my old EGR cooler i do see where it was seeping coolant through the weld/crack. The guy also sent me the solenoid so i swapped that in and replaced the vacuum lines and I'm not sure what needs to be done to clear this fault code. The used EGR cooler spring and everything looks to be in better condition then what i took off my car.

I can't recall if the 335d M57 has a EGR thermostat? I don't think i saw one the other day..

Is the spring in the cooler moving correctly?

[_N54]

Originally Posted by Drews2k

Is the spring in the cooler moving correctly?

Yes, it moves back and forward freely.

[_N54]

Just wanted to keep everyone in the loop in case someone does a search later on and my thread pops up. The car got the fault code 4530 a couple days ago. I ended up replacing the vacuum actuator near the firewall and all the vacuum lines and my original fault code P2457 (EGR) Cooling System Performance strangely disappeared with fault code 4530. So I'm assuming the vacuum lines I replaced above the turbos did help something out even though they appeared to be in some decent condition. The car has a lot of power and boost now.