[N4Nick]

Hello everyone,
So i replaced my waterpump and thermostat on an 09 e92 335i with the n54 after getting a waterpump code and overheating on the highway which caused me to push it back home. I am still getting the waterpump code, the car overheats, and when I tried to start the coolant bleeding process nothing happened, I checked all 3 fuses( 2 in the fuse box and one near the ecu) and they all came up good. I did noticed some coolant in the connection of the waterpump so i dried it up and plugged it back together properly. My suspicions are the voltage regulator or the fuse box ontop of the battery, I am also considering the IBS has gone bad because I am getting a code but the car starts. When the car starts it takes a few seconds to crank over and then the electronics inside the cabin take like 30 seconds to come on and I feel like these issues are caused by the same problem. My question is what should I look at/ replace first?

Thank you.

[konstat]

Originally Posted by N4Nick

Hello everyone,
So i replaced my waterpump and thermostat on an 09 e92 335i with the n54 after getting a waterpump code and overheating on the highway which caused me to push it back home. I am still getting the waterpump code, the car overheats, and when I tried to start the coolant bleeding process nothing happened, I checked all 3 fuses( 2 in the fuse box and one near the ecu) and they all came up good. I did noticed some coolant in the connection of the waterpump so i dried it up and plugged it back together properly. My suspicions are the voltage regulator or the fuse box ontop of the battery, I am also considering the IBS has gone bad because I am getting a code but the car starts. When the car starts it takes a few seconds to crank over and then the electronics inside the cabin take like 30 seconds to come on and I feel like these issues are caused by the same problem. My question is what should I look at/ replace first?

Thank you.

This does seem like an electrical issue. Did you replace the voltage regulator? How old is your battery?