Hi,
Yes, all JZS171s came with remote central locking. You'll need a blank key with the central locking fob which you can program to the car.
There is a "Modern Crown owners" page on FB for Australian owners of 170 - 210 series Crowns so you'll get a quicker answer to your questions on there, I believe there's only 2 or 3 JZS171 owners on the Toymods forum.
P.S. Throw up a ride thread for the Crown!
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