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hey guys,

i have had this annoying issue for a while now, trying to sort it out today.

the central locking (factory system) in the passenger side door on my NB8B does not work i.e. when i press the button to lock or unlock it is non responsive, where as the driver side door locks & unlocks.

i took off the interior door cards & upon inspection, all looks to be okay (in terms of the connecting rods & pieces), the mechanism does not work when i lock/unlock by hand from inside the car, the door can still be opened from the outside. the only way it will lock/unlock at the moment is if i lock by key from the outside. what is the issue here?

i think it is the locking unit itself seen circled below - this may need replacement - has anyone had a similar issue?


this is the path of the rod connecting to the locking unit


everything seems fine here


does anyone know the part number of the first photo? also how the heck this comes out?

cheers,
jas.

NB8B central locking motors tend to die an early death so it wouldn't be surprising if it has failed. But you should still be able to lock and unlock the door from the inside if the door is closed. Take out the lock mechanism and trace the cable from the interior door lock and see where it goes.

Garry wrote:NB8B central locking motors tend to die an early death so it wouldn't be surprising if it has failed. But you should still be able to lock and unlock the door from the inside if the door is closed. Take out the lock mechanism and trace the cable from the interior door lock and see where it goes.

how does the locking mechanism come out? it seems awfully tight in there, it's lodged in between the metal plate of the door & the glass slider.

appreciate all input.

Cant remember off hand but start with the 3 phillips head screws in the side of the door. You'll also need to undo the push rods from the outer lock and handle. Undo the 2 cables from the inner handle. Then there'll be an electrical connection somewhere. After that with a bit of wiggling around it should come out. Oh, you'll need the window to be up too. Something along those lines anyway, it's been a while since I took one out.

Garry wrote:Cant remember off hand but start with the 3 phillips head screws in the side of the door. You'll also need to undo the push rods from the outer lock and handle. Undo the 2 cables from the inner handle. Then there'll be an electrical connection somewhere. After that with a bit of wiggling around it should come out. Oh, you'll need the window to be up too. Something along those lines anyway, it's been a while since I took one out.

thanks for that, i will look into it a bit more before i touch anything.

do you know how i can get a hold of the part number for the locking mechanism as circled above?

cheers.

if its a Mazda part then go to them for details. The other thing to do is go to a do a business that does this work- it might not be a big problem.

Mr Morlock wrote:if its a Mazda part then go to them for details. The other thing to do is go to a do a business that does this work- it might not be a big problem.

it isnt a big problem, going to a work shop will be my last avenue.. its not too bad of a job when seeing what is involved.. but actually doing it is a massive pain in the ass. so if i cant do it myself, then i will go to a shop.

after looking at the FSM - all that is needed in order to remove the locking unit is removal of the rear glass guide (that long piece of metal). without the guide coming out, the lock mechanism will not come out.

rear guide on left:


there are supposedly 2 bolts holding this in place (top & bottom), once loosened it should come off:


bottom bolt off - the thread is hanging out of this hole & it's joined to the metal guide itself, im not able to move it in any way!


the top view of how the guide is connected to the window - this does not budge at all


the top bolt i have removed, again the thread is poking out of the small hole & does not budge at all. this too is connected to the guide.


there's obviously a trick to removing this guide - but following the FSM alone is not doing it for me! the way it is lodged it literally has no play at all even to slide it to one side rather than removing the whole thing. really is a piece of crap. is there anyone who has done this before who can offer any tips.. hints etc.

cheers,
jas.

On many vehicles removing glass guides requires the removal of the glass first. If you don't know what is the problem should you remove an item which is a bit of a hassle without trying to diagnose if it's the faulty product. The workshop manual normally have numbers on them to say which is the order for removal so check if there is a number on the glass. The workshop manuals often dont say how to remove something because it's aimed at people who have prior knowledge/ training.

I don't remember removing the window guide when I took the lock out of my car.

I use this site when I'm looking for part numbers but it's a US site so you have to be careful on some parts.

http://www.jimellismazdaparts.com/cars/mazda/0/miata/car-parts.html

I have heaps of the NB8B door lock mechanisms if anybody needs one.

Thanks for the help - confirmed the window needs to come out.

Boyracer i will contact you if needed mate.

cheers.

You can remove the lock mechanism without removing the window or guides.
I have a few spare electronic lock modules.

beavis wrote:You can remove the lock mechanism without removing the window or guides.
I have a few spare electronic lock modules.

how?

i have confirmed with 2 sponsor work shops that glass needs to come out - also are you able to send me a pic of the failed unit? was told you cant get these new from mazda?

i did it to 2 nb8b doors this week.
the window was fully up, was not removed.
it just takes a lot of jiggling and angling

but i removed this bit in its entirety: