Quote:
Originally Posted by e92proper
As far as we know there has never been an n55 over boost engine failure (nor a failure not related to bad main bearing or vanos bolts shearing). over boost can be caused my many things one possibly being an IC pipe blowing or maybe drastic change in altitude??? I'm saying, an over boost can be seen on a stock ecu in some cases.
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If they see your car was flashed they are going to void the powertrain warranty for any reason. The 335i has a flash counter on it and the AP changes that counter when you flash it. Also the overboost you mentioned is what will tip them off about it. That is the nice thing about the JB4, the ECU doesn't see overboost.