Input filter pcb layout considerations
The ISO 7637 pulse test requirement is this: -



And, with those sort of slow transients a ferrite bead will be absolutely useless. Both circuits will be ineffective against pulses. These are the sorts of voltages you need to be protecting from: -



You should look to protect your circuit from load dumps like this: -



But be aware the currents can be high. Maybe you look at a series regulation method of protection like this: -



Picture taken from this useful article on load dumps (Maxim app note 4081)