according to your sentence, he would be dead. Plus “Passenger Seat” does not just mean front seat. the front seat of a vehicle (such as a car) where a passenger sits. Now…
While passengers could also sit in the back seats, if you use the term “passenger seat” it (at least in the US) it always means the front seat that is not the drivers seat. So much so that the sides of a car are called “drivers side” and “passenger side”.
So therefore, he would be dead.