Quote:
Originally Posted by bmw540san
It's well established by know that the map controled thermostat is great in theory and improves fuel economy but at the cost of increasing pressure on cooling system (more heat = more pressure).
Also, if component in cooling system fails (and it will), you're much closer to potential serious problem of overheating vs running on cooler thermostat.
I've ran this on my E53 4.6is and have sold few dozen to E39 forum members couple years ago. I've had good connection in Europe and got this for much better price. This is OEM thermostat for E38 740D never sold in US.
https://www.ecstuning.com/b-genuine-...CABEgKFZ_D_BwE
Direct fit other than installing simple resistor into disconnected wiring connector to avoid CEL. |
I've been hoping for something like this to be available. So did you install that on your E53 M54?
Did you install a resistor? I expect based on my measurement mentioned above, that a 15 Ohm, 15 Watt [or higher] load resistor would be needed to sufficiently convince the ECU that all is good.
I found this youtube video that shows it. One of the comments says that they did nothing with the resistor and no CEL ever came on. If that is true, I'll guess they still had that code I mentioned above - I got no CEL, but did have that DME code that my Foxwell read. I'd be at least a little concerned that the ECU does not do something in response to that.
https://www.youtube.com/watch?v=PfyYw6LkHiE
Otherwise, I'll probably get one of these ... as soon as I fix my engine.