What's the chance that: 1. You get a fuel leak in the engine bay while driving. 2. There is not already another safety system detecting this. 3. The driver act

What's the chance that: 1. You get a fuel leak in the engine bay while driving. 2. There is not already another safety system detecting this. 3. The driver actually notices this while driving. 4. The driver decides to take action by turning off the key, without stopping the car first?! 5. For the scenario to be dangerous we are also assuming this leak is severe enough to eventually cause ignition and catch fire. This is like taken from a b-grade action movie and doesn't happen. Any scenario i can think of where you would require an emergency shutdown you would also want to get the hell out of the car asap. You could also imagine that things like cruise control "get jammed" but i find that extremely unlikely since software doesn't have the same wear and tear as mechanical components and sensors. Worst worse case you can always stop the car use the mechanical brakes or gearbox since those have more power than the engine. Unless we are talking about brake by wire or similar but those have _completetely_ different safety standards, there is also a reason those are not on the market yet.