this picture the lever is out and you can see the white circular guide (039817462A seat). this is the old one. the new rubber (NA0164481B Insulator)is eased on. I used wd40 but have read that water is used also.
the three 10mm head screws are undone and the gearlever is pulled out. i cut the old gear lever dust rubber off.
here the large gearbox dust cover (M51417480A boot dust chng lever) can be seen that covers the gear lever. you can see that the rubber has perished completely and that there is no middle. four 10mm bolts hold the gear box dust rubber in place.
with the centre console off you can see the next thing is to take off the sound insulator. the two electrical connecters can be seen to connect lights and to the electrical window switchs.
After sourcing the parts. there are two philips screws either side of the console at the front, one under the ashtray and two in the rear console under the locking lid.
See pictures above
I used to get warm air from around the gearbox and wondered if this was normal. After research on the net, I found that there are a few dust rubbers which can be changed.
This stopped the warm air from rising from the gearbox area. Also afterwards the gear change is completely different. The rubbers give a more positive feel to the gear change through the gears. There are also a few sites which give details of the part numbers also needed. I also managed to download the part numbers from the miata website which was very helpful when calling the Mazda dealers in the UK.
The bottom one is called Boot Dust Change Lever (or Change Lever Dust Boot in English) - it's M51417480A - list price a year ago was 14.90 (+ VAT). The "middle" one is called "Insulator", is NA0164481B, the plastic bush is called a seat 039817462A.
I changed the gearbox dust rubber which covers the gearbox under the centre console, also the plastic bush and a second rubber which also covers the gearbox. Pictures show a step by step of how it was carried out.