What's the best way to prevent keyless entry car theft?

How can I protect my keyless entry car from being stolen?

Is it possible to get into a car without a key?

My sister's car was broken into but undamaged. She said that thieves have a device to open any car without causing damage. Is this true?

Are faraday bags useful to stop keyless entry theft?

Are faraday bags for car keys viable? Surely when the key is removed to enable the engine to be started it becomes vulnerable to hacking. Also, once started my car will continue to run even when I move...

Does keyless entry theft only apply to cars with a push start button?

Does keyless entry theft only apply to cars with a push start button, or all cars that are opened with a key fob? I would like to be clear so that we can take appropriate security action.

Are all cars vulnerable to 'relay' theft?

I've read more and more about the 'relay' method for car theft. Are all cars potentially a target, or only those which have keyless entry?

Can the signal from my key fob be read by thieves from inside my house?

Can the key fob for my keyless entry Jaguar XF be read inside my house by thieves?