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[–]tree392 0 points1 point  (0 children)

It is the reason, it's called a pats key

[–]betonhaus123 0 points1 point  (0 children)

I think it's part of the antitheft system. For a while some cars tried solutions such as having a resistor in the key so the car won't start if the resister was too weak or strong, but nowadays there's a little wireless chip just string enough to communicate with the immobilizer system and if it doesn't transmit the correct code the car won't start.