1996 bmw z3

A friend just bought a 1996 Z3 with the 1.9 liter 4 cylinder engine. There is a gas smell in the trunk, but no visible leaks. I did see a tear in the boot around the gas tank fill opening. Would that cause the gas smell in the trunk or should we be looking for something else? Thanks.

I would say you are smelling what is left from a gas spill, as a leak in the tank or plumbing would set a code.

I agree. Remove the trunk carpeting and see if the smell goes with it.