jaitch
Member
Tesla added the PIN to drive because the key fobs used an algorithm that used a relatively low bit encryption. Some cars in Europe were stolen by some sophisticated thieves. It appears they recorded a number of key fob presses, then figured out the algorithm from that. As soon as they got access to the car using a lap top that generated the code the car was expecting they turned off all communication from the car to the outside world so neither Tesla nor the owner could find it and drove it off.
I suspect the key fob update implements a more complex algorithm for communication that makes it harder for would be car thieves to hack the key.
The thefts we have seen here in UK are relay attack and not algorithm related and pin to drive was the solution. Not sure about Tesla but some newer fobs have motion on/off so relay attacks are not possible.
Relay car theft: What is it, how can you prevent it, and will your car insurance cover it?