Removing the radio
There are a lot of people on the internet asking how do you remove the radio from the K12 Micra. It's actually very simple. You will need the following tools: a Philips screwdriver and a 10mm socket and extension bar. One cool thing about the K12 Micra is that the radio wiring uses standard ISO connectors which means you don't have to pee about with harness adaptors if you replace your radio .

As an aside, I've just had an email from Kasper Winter in Finland to say that if your car came with a single DIN surround but you want the double-DIN like this one, the Nissan part number is 68261-BC621 and they cost around 60 euros.
[A] Start by gripping the black rubber door trim and pulling it directly away from the door frame. It should come off very easily. Pull enough off so that both ends of the front pillar plastic are exposed. Do this for both sides of the car.
[B] Remove the pillar trim pieces from both sides of the car. They pop off very easily, just get your finger tips behind the top section and pull.
[C] If anybody knows what this odd cloth covered wire that bolts to the inside of the pillar is, please let me know

Update: I've been informed in an email recently that this is part of the antenna for the keyless entry system!
[D] You now need to start lifting the edge of the dashboard. The whole section is only held on by six plastic clips and is very easy to release, I use my fingertips but you could use a wide flat blade screwdriver.
[E] You can now lift the entire dashboard cover out of the car and put it somewhere out of the way. In this photo you can see the first of the three 10mm bolts you will remove in the next stage.
[F] You now need a 10mm socket and extension bar to remove these three bolts. Be very careful because if you drop a bolt, it'll disappear into the recesses of the car. Remove the metal bracket and put it somewhere safe.
[G] This trim piece above the radio is held on by two fairly strong clips. The clips undo by pulling the piece horizontally towards you, you may need to put something between it and the dash cover to help lever it off.
[H] Undo the two screws you've revealed and store them somewhere safe.
[I] Underneath the bottom of radio surround are two more Philips screws. Remove them and put them somewhere safe.
[J] The radio and the surround can now be pulled out a few inches. Tilt it forwards and disconnect the aerial and harness connectors. The radio assembly can now be removed from the dash.
[K] The air vents are held on by two plastic clips. Use a flat blade screwdriver to carefully release the clips and remove the vents.
[L] The radio is secured in the cage by four screws on either side. The surround is held on to the cage by four screws, two at the top and two at the bottom.
[M] If you ever disconnect the battery, your radio will ask you for the four digit security code. If you've lost the code, there are calculators on the internet that use the serial number to generate the code. The serial number is the number starting with BP (the radios are made by Blaupunkt) on the label stuck to the back of the radio.
And that's all there is to it! Installation is just a case of following this guide in reverse .