There's no such thing as an "NA2 key". NA1 and NA2 are engine codes that refer to the 3.0-liter and 3.2-liter engine.NA2 key contains a chip.
There's no such thing as an "NA2 key". NA1 and NA2 are engine codes that refer to the 3.0-liter and 3.2-liter engine.
There are two types of keys used for the NSX. The '91-96 models (all of which are NA1) used a conventional key that was cut to fit, and any key that shape would work. I even have one made of plastic that will start my car just fine.
The '97-05 models (including both NA1 and NA2 models) use a key in which an electronic chip is embedded in the head of the key. This chip is read by the immobilizer security system in the NSX. If there is no chip - and there wouldn't be, in a solid metal (or solid plastic) key - the car won't start.
I have had a NA1 metal key milled to take an immoliliser chip so that it works on the NA2's.
The chip can be bought and programmed by most locksmiths who have the facility to copy chips; cost ~ $15
The key was milled for me by Mallard Signs & Engraving 7 Macbeth Street Braeside Vic 3195 www.mallardsigns.com 03 9587 2587. They still have the template software so if anyone is interested they can contact them. Any engraver/sign maker with a CNC milling machine can do it but will have to start from scratch though.
Note that if you decide to do it the position that I have the chip in is the only position that will work, I have tried various positions and all others are too far away from the reader in the steering lock.
That's awesome. Did you cover up the chip with bondo + paint after placing it in the key? I'm very tempted to try that.
No I did not. You will note that the key surface/plane at that location is not level; the chip actually sits a little proud (< 0.5mm) at the end near the key stem. You cannot mill any deeper which you will need to do in order to fill/sand/paint as you will run out of material. I did try and sacrificed a key blank !