Source: http://www.hybridcars.com/bmw-recalls-us-i3-rex-plug-in-hybrids-for-problems-with-fuel-line/
Bob Wilson
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BMW discovered the car’s fuel tank vent line can rub against the sleeve of a battery cable. That friction is capable of causing a tear where vapor can leak out, which would be vulnerable to fire.
The problem was originally discovered by a BMW dealer.
. . .
Bob Wilson