Quote:
Originally Posted by possible335i2008
Does anyone have any actual situations where an engine issue has occurred when a JB4 was installed and prior to warranty claim the JB4 was removed and BMWNA was not able to tell the vehicle had been modified?
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No one is going to admit to warranty fraud in public but it's rare to find anyone who has ever been denied due to say a JB4 that was properly removed. Those who get flagged either have flash tunes or other mods like downpipes that are easily detected.