Does anyone know whether the Prius is immune to this? New $5 device easily unlocks car doors for thieves in Winnipeg - Manitoba - CBC News Also see: Police admit they're 'stumped' by mystery car thefts  - TODAY.com
We have never locked our prius. Though I understand there are places where you need to. Keeping valuables in your vehicle is a mistake.
We need more information about what this device is and how it works before anyone can say which cars are vulnerable. My local news carried a similar story many months ago, reported from another state, but I've seen no followup.
Even if it does open a Prius, it doesn't make it any easier to steal. If all they want to do is get in and steal your stuff, a locked door has never stopped them before.
The linked article is extremely vague... "The new device can be purchased online for about $5 and sends an electromagnetic pulse through a car’s key area to unlock the vehicle." Without additional info- it's impossible to draw any reasonable conclusions.