ELI5 Car Keys - could my remote open someone else’s car?

ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast

Is it theoretically possible that my key could unlock a second car somewhere else in the world? Why is the keyless entry system separate to the keyless ignition system? What is an immobilizer? What is a rolling code, and why is it important that my car has one?

... We explain like i'm five!

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: miichiseboss123, matraxia, hands_on_tools, dragonx254, donaldpshimoda, slightlylesshairyape and raresh985

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

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