Nissan K11 (Micra) Blank Keys. A way round the nightmare .

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There's quite a few sellers selling blank Nissan keys on Ebay. ALL honestly point out that this is only a key blank with no transponder and no remote opener electronics. I used seller 1ead11.  
Don't be put off, this is the simple way of getting spare keys, that work, without spending £200 with Nissan.

OK, you have only one key left for your 2001 Micra? (or other Nissans, or Fords come to that). The problems you have with this is :-
1. If you lose it, you are obligated to spending huge amounts to get someone mobile to come out, open the car, change all the locks and ignition switch, re-program it and cut two keys. (£200-£300?). Forget it, break the car for spares and cut your losses......
2. The actual blade is now getting worn/thin/twisted and will almost certainly have a narrow bit somewhere in the 'cuts' that WILL eventually snap the key in two, either in your pocket, somewhere in the park or inside the ignition switch/door lock. Ouch, I can feel the anxiety already?
Lets completely ignore the remote door opener part, if that's playing up, there are repair kits out there on eBay, and hey, you can always open it with the key. OK, not ideal, but it's an old car for goodness sake. The remote section has a history of problems, documented throughout the web. This part is in the part of the key that holds the battery, and clips out of the 'horseshoe part of the real key part. Just a poke with a screwdriver in a little notch pops it out. It has nothing to do with the immobiliser. Google it anyway.
In the 'horseshoe' part, the bit with the actual blade attached, which is now open, you can look inside and probably see a small plastic 'chip' that is stuck in, possibly blue in colour. Do not make any attempt to pick it out, rake it with a screwdriver or otherwise get inquisitive. It's just a chip and you'll probably slip and break it anyway.

OK, OK I'm getting there. Buy two keys, with empty electronic cases from eBay (Try 1ead11, as a seller), they're only a few pence dearer than just buying the horseshoe part, and they're always handy. This will cost about £8-£10 with postage. There's two sizes, 37mm and 42mm long, that is  from plastic to blade end. Measure, and re-check, a good seller will have this in the description. Move away from any seller that hasn't mentioned the length, they're obviously not aware of it. Take these to a local key cutter and expect to pay £3 each for them to be cut. Enclosed markets etc are better than glossy shoe shops in the High Street, they always seem to be miserable and resentful, or it it just me? Normally, they won't get the hump, as they don't hold these keys anyway, as they would 'normally' have to be re-chipped and programmed. Smaller shops don't want the outlay, the technology learning curve and risks. Even Timpsons, they who will re-sole your shoes and sell you a very nice, slate house name at the same time, who do supply the chipped keys don't supply the remote bit anyway, last look they were £50 each (special offer now and then at £25, but then didn't have the 'right' chip, ho hum....)
Now the clever bit. Take the original key, leave it as a 'horseshoe', that is do not insert the button part of the key, with or without the 'electronics' inside. Slide this up behind and under the ignition lock (behind the plastic case, horseshoe first, at about the 3'o'clock position of the ignition lock. It should go all the way up until the end of the blade is just about level with the end of the casing.  Now try one of the 'new' un-chiped keys to start the car. All working OK? Try the second 'new' key. If it doesn't start, you haven't poked the key in close enough to the switch, try turning the key upside down, so that the chip gets closer to the switch. Turn the ignition right off before trying again after a non-start. DO NOT WORRY if it doesn't start, it's just not close enough. To reassure you, take this  original key out and start the car. See, when the chip is close enough, it works just fine. In fact on a Transit, it can be three inches away. All done? Dab a bit of clear/white Silicon RTV sealer (that's those long tubes of bath tub sealer) on the end of the blade and casing, a big dab won't hurt. It's to stop the key falling out. Let it sit in the cover for a few minutes, it'll cure in about 20 minutes but you can still try it all out in the mean time. Don't use glue or two pack, Araldite adhesives because at some time you may need to retrieve it and as Silicon is all squidgy, and rubbery, it's easily picked out and off, you can get your fingers in there very easily, without resorting to wrecking the plastic casing.

What you have done is place the transponder chip next door to the pick up coil attached to the ignition switch, it'll be there for ever, and your keys will always work. In the unlikely event that you lose both new keys, the AA will gain access to the car, pick out the old key and away you go. Best to mention all this when you call them. Also, make a note in the handbook, so new owners will know what's what. Of course you DO lose the anti theft facility because the transponder is always with the car but hey, who's to know and whats the chance they pick on the only car like it? Anyway, once the ignition is turned off, the red flashing LED still works as it doesn't look for the chip until the ignition is on. Cool eh?
In the event that your remote bit was working, it can be pushed into one of the  'new' keys.

Cost? £10 keys, £6 cutting, £3 silicon (from Toolstation  12390 or Screwfix 35887)  and you can always stick the seat hinge covers/ tack the carpet down/ make clear silicon sculptures with the rest, it won't keep once opened)  That's under £20 all in? And you've now got three keys that work!
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