740i Fuel tank imploded.
The fuel tank on my 1997 740i has been building up great amounts of pressure. It is almost impossible to get the gas cap off and then when it does come off there is a huge "whoosh" sound from pressure release. My mechanic said to get a new ventilated fuel cap but problem remained. My fuel tank on the drivers side has actually imploded and is sitting in my garage leaking gas. This problem is also causing the fuel to stop flowing when I get down to 1/4 tank. BMW says there is no recall on this issue. Seems like a dangerous situation to me.