Originally Posted by ABMW

Unfortunately, it's impossible that BMW would have engineered them to be immune to all types of interference and hence the FCC warning/disclaimer on each and every electronic device one purchases, notifying purchasers that their products are subject to interference from outside sources. We've all read them, and they're printed on most devices large enough to carry such labels.

There are devices that are immune from such interference, called "hardened" circuits or known by other monikers, but they're reserved for military use, VIP use, or for equipment that "CAN'T FAIL," such as certain aspects of the Internet and Banking Computers, etc.

Consumer electronics, BMW Automobiles, being included into that category are subject to interference from just about everything. The question is, was the car exposed to something out of the ordinary?

It's entirely possible, and there's absolutely NO way that BMW has "hardened" the electronics of the X5 to be immune from electrical or electromagnetic interference. The vast majority of commercial airplanes are not even hardened, hence the "turn your cell phone and electronic devices off."

This is a very real possibility, for better or worse, and is a growing and known problem as technology continues to enter into our daily lives in more pervasive manners.

Even those with biomedical devices such as pacemakers, some artificial limbs, and neurostimulators (pain management devices), are prone to such interference.

The above is quite factual gentleman, hence be aware, that such a scenario is not outside the realm of a rational explanation.