I thought all did away with the chip in the key head. Ours "read" the key via hall effect sensors in the ignition switch so a simple copy does work. This system replaced the old resistor in the key system.
Not as recently as 2005 I know for sure, because I own one.
The keys are VERY expensive, even when you have all of the codes and are at the dealership.
Not to mention a tad large.
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