Quote:
Originally Posted by nextcar
...but I can't figure it out.
Why are there two totally different/incompatible styles of lock cylinders used on the door and trunk locks?
It appears that base models use standard keys and lock cylinders (though the key obviously has an immobilizer chip for the ignition).
Cars with "smart entry" use laser cut keys (much more expensive, and requiring different lock cylinders).
Just something to keep in mind if you swap parts between cars with and without smart entry - the lock cylinders cannot be rekeyed - the mechanisms must be swapped out or replaced.
On a car as cost conscious and relatively low production as this, I cannot fathom the justification for two different lock sets! 
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Locks are parts bin pieces so the cost is minimal since they are spread across all the models. They use the laser cut pull out key in the keyless fobs to keep the size down. If they used a full size key inside the fob it has to be about an inch longer than it is now.