Best thing to do is call your local dealership and ask them how much it would cost for an extra key. But just to give you a heads up it's going to cost around $160 per key.
It's going to be exactly like what you have now. Remeber this is a rough estimate. That was the estimate for a transponder key without the lock/unlock/trunk release on the key itself. Yours will probably be more to cut and program.
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