I CAN VOUCH, 2005 key works in 2004 cars
 

THIS CONFIRMS IT!!!!!!!!!!!!!!!!!!!!!!!!

I had read a couple of posts of success stories with the 2005 key on the 2004 car but MANY more posts of failures...and the failures were by reputable sources, even dealerships couldn't get it to work!

But I still hoped that those few posters had indeed found a way...so I took a gamble and had Thew at www.rx8garage.net sell one to me...I told him worst case scenario, if it doesn't work I have a sweet transmitter FOB :)

I got the key and in mail and brought it to the dealer to get CUT NOT CODED THERE (coding at a dealership was $80 at my dealership)

well the guy in the parts department cut the key for
me...guess how much it cost???? NOTHING! they cut it for free hahaha (they only needed my original key and the some verification I own the car)

and on the first try programming the cut key blank's chip it worked!!!!!!!! no
problems...just like the instructions said, and just so you know I have a May 2003 build date (I think on the second boat) so the 'theory' that it doesn't work on older builds is FALSE!

insert first key, turn to on position, wait until security light goes
out, then turn to lock position and remove key

insert second key, turn to on position, wait until security light goes
out, then turn to lock position and remove key

insert NEW key, turn to on position, wait until security light goes
out, then turn to lock position and remove key

Then reinsert the key and your done!!!!!!!!

the only way this procedure would NOT work is if the customer only had
one key not two...or if they were coded improperly (unlikely)

As for the FOB transmitter:

as long as you do the first few steps QUICKLY then when you press the
transmitter button twice it works like a charm...sweeet!!!!!!!!

On a side note...the way this was handled, I am betting that Mazda
tried to cover up that the 05 key works in the 04 car!

Here is the link to Thew (from rx8garage.net) selling it as a special price to rx8club members: https://www.rx8club.com/showthread.p...d=1#post663927


Here is the link to the procedure I used...just download the images
that are attached in the first post (thanks MazdaMonkey and IFubar2000 for all your support)...
https://www.rx8club.com/series-i-do-yourself-forum-73/diy-code-your-own-key-remote-43873/

-Jason (Truemagellen)

PS. I'll post many pics later this evening, multiple shots, multiple angles open and closed!

I also have the 2005 RX-8 key working in my 2004 RX-8 without any problems at all.

Let me point one thing out...some members have said you can program the New key with an Original Key and a Valet Key (if you only have one original key)

I can not verify this but....just thought I'd let you know

I can also vouch for the fact that the 2005 key works on the 2004 RX-8. Just followed the posted instructions and it worked fine.

Side note on the remote programming. Not really a big deal but make sure to do all your remotes when you program in the new one. I was surprised when I took my car in for servicing and my old fob that used to work wasn't working. If you have more than two remotes and plan on using the third one in the future make sure to reprogam all of them. Best way I can think to explain it is if you add a new remote fob to your car the last one on the program list gets bumped off if you don't reprogam them all at the same time.

Probably should have metioned that I just ran through the fob progamming instuctions again this time with all three fobs to fix my problem. Now everything (and all set's of keys and fobs) works great. That's why I said it not a big deal.

Me too . Mine is workigng great

ok I uploaded pics to the orinial post here they are:

https://www.rx8club.com/attachment.p...chmentid=37065
https://www.rx8club.com/attachment.p...chmentid=37064
https://www.rx8club.com/attachment.p...chmentid=37061

See how it lights up in the middle of the FOB when you press down? sweet :D
https://www.rx8club.com/attachment.p...chmentid=37062

and closed :)
https://www.rx8club.com/attachment.p...chmentid=37089

and there now listed on my site
Rx8club members get gold pricing on this !http://www.rx8garage.net/?page=shop/...roduct_id=260&

Congrats on your 200dollar key man. Takegood care of that sucker

I for one love it.. its a sweet unit and very handy.
P.S. 175 $ is a far cry from 200 .. :rolleyes:

if you look at my last post #7, I added more pics :)

oh I forgot to mention the major reason why I wanted to get this key (posted before) I was always feeling like I was in a Ford rental car with the original 04 key/keyfob, yuck

Can you put that on a key chain? I dont have many keys, just a house, mailbox, car key. I dont want to have to carry two sets of keys, kind of defeats the purpose for me.

yes it does...look fob in the right side of the picture here...the shiny/chrome bottom there is a spot to slide a key ring on

it is funny when I called one of the vendors who had tried and failed to code the key I as asked them if it can be put on a key ring, they said no and suggested to drill into it and add a hole for it.

https://www.rx8club.com/attachment.p...chmentid=37094

Ahhh I see it now, I was thinking that was were the key fit into the fob. Got it now. thanks

Kool keys man, I just have one question don't know if you can answer this but anyways, can you program the 05 keys to another rx-8 if the 05 key was already program to another car? example=Let's say I got 04 rx8 and my brother got 05 rx8, he gives me his spare key that was program to his 8, so can I reset it or just program it to my 8?

you should be able to yes, no problem...BUT one thing

buy an extra 04 (the cheap one) key blank and program that one first so that he has two keys with chips coded...you can probably get it for under $15

the reason I say this is were aren't %100 percent sure you can code the new key off a valet key and an original key

this way you both have two original keys to code off of, with the new cheapo blank as the go between

What you are programming is the PATs function of the PCM to the key..This will allow the PCM to accept up yo 8 different frequencies.

Not the key to the car..

interesting...so does that mean you could use the key in either car?

Think it will.....
 

If you code your brother's 2005 key to your car, it will start both.

The car's coil 'interrogates' the I.D. of the key and either accepts it or rejects it. If it is also registered with another car, it don't care. Yes, it would start both cars.

S

Sorry, can't resist but if you spend 175-200 for a key do you wear it like a watch or necklace? I mean the car is great but spending that for a key??

it is $230 at dealerships...Mercedes, BMW...keys START at $300 and aren't this cool

but think about it in a much different way...if you bought a closeout 04 for several thousand less then an '05, but missed out on the cool key...well under $200 is a great deal...since the 04 car and the 05 car are identical in every other way :D :D
(besides white replacing yellow of course)

Thanks for answering my question about my brother's key working im my car. It is exactly what I wanted to hear, so now I can ask him to trade me one of his keys. Hehehehe. :p

just remember you will need to buy a new key blank, we forgot that it has to be cut the same :P fortunately that is the cheaper part I'm told

yes you can get both halves i jst did not list it that way.. I will order anyone any half they need.. BUt i will carry the package for sale (key & Fob) as one unit.

moved :)...probably a good idea