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Sounds exactly like how the thieves steal these newer model Lexus. They break into the car, obd2 port it. Program a new key and then drive it away. Maybe you caught them mid act or something and they didn’t have a chance to jack your car yet. But they already have a key so they can come anytime to steal it.
You've likely heard of the "relay attack," in which a device is used to capture the signal of a car key fob that is inside a house and then amplified to open car doors. But experts say there's a cheaper — and easier — solution thieves are turning to: lock picks. These tools are available for under $60 on online marketplaces.
Once inside the car, thieves typically plug a key programmer — available for under $1,000 online — into the car's On-Board Diagnostics (OBD) port, usually located under the steering wheel where mechanics can plug in a diagnostic tool to the car's computer. Using this port, thieves can program a blank key fob to match the vehicle. It can be done on nearly any vehicle with a push-to-start ignition. Vehicles with physical keys require a separate tool to clone the key.
recently had this If "A New Key has been Registered Contact Your Dealer for Details" is displayed, what does this mean?
In my case I lost one of my keyfobs and bought a new one, they (Lexus) reprogrammmed both keys to be safe and I also got that message. They told me the message would go away in a week or so and it did. Wait and see if goes away.