DIY: Code your own key / remote
I've seen a similar question asked here before, but no answers that satisfy me were given.
I have a 2004 that I purchased last November. I have 1 working key, but the fob I was given has never worked. I replaced the battery with no success. Tester at the local auto parts store showed a weak, intermittent signal, so I chose to buy a new remote.
Both remotes are:
Visteon 41848
KPU41805
4238A-12076
When trying to program them, I follow the instructions here, and successfully get to the "Press any button on any single transmitter twice." step, but neither the old nor the new remotes cause any response when any button is pressed any number of times.
Have I missed something? Have I purchased the wrong fob? I'd prefer not to buy the flip key, since I only have one key and would need to purchase another from the dealer in order to program it.
I have a 2004 that I purchased last November. I have 1 working key, but the fob I was given has never worked. I replaced the battery with no success. Tester at the local auto parts store showed a weak, intermittent signal, so I chose to buy a new remote.
Both remotes are:
Visteon 41848
KPU41805
4238A-12076
When trying to program them, I follow the instructions here, and successfully get to the "Press any button on any single transmitter twice." step, but neither the old nor the new remotes cause any response when any button is pressed any number of times.
Have I missed something? Have I purchased the wrong fob? I'd prefer not to buy the flip key, since I only have one key and would need to purchase another from the dealer in order to program it.
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Joined: May 2012
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From: Grand Rapids, MI
Thank you.
Registered
Joined: May 2012
Posts: 11
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From: Grand Rapids, MI
Thank you.
eBay sells them, as well as the dealer but will cost more. You should read through the last three pages in this thread, it'll save you time asking questions because most of the common questions have been discussed previously.
I just bought a switchblade key and got it cut. Now when I go to program the transponder I have a slight problem. I do the first two keys just like the DIY says but when I put in the new key the security light keeps flashing and doesn't go out like it did on the first two. I haven't tried cranking it, but every time I try to program it it just keeps flashing when I put in the new key. Even if I take out the key and put it back in it just keeps flashing and doesn't go out like the other keys. Is this normal?
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From: Uk
hi,ive same prob as you,bought the car 2 weeks ago with 1 working key and 1 valet key,and no fob.ive bought the flip key and got that working in minutes to save looking old skool having to put key in the door lol,now ive had the key cut and tried the programming procedure only to find the valet key keeps the light flashing also so seems i only have 1 good key for engine starting,and i darent try cranking the engine either incase of probs,is there no way to do it yourself with the 1 key or is it gonna be expensive trip to the dealer :-(
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From: Uk
Saphryn135 the first time I tried this procedure it didn't work for me either,turns out I was doing it too quickly,do the key switches and then the door catch 3 times and then wait couple secs while door lock/unlock twice and then I pressed the lock twice,unlock twice and boot twice,wait 30 sec and bobs yet uncle,and strata-r mine too was the seperate key and fob and I just bought a 2nd hand mazda switchblade key off eBay,the programming is simple enough although I've only got 1 working key at the mo so as yet cannot use the blade to start the engine so basically I've still got seperate key and fob at the mo,any help programming with 1 key would b appreciated by anyone tho :-)
You need two working key transponders to program additional keys. If you took the time to read this thread, there wouldn't need for this question to be asked... Go to the dealer, give your VIN, and fork out $190; they will provide a new set of key(s) programmed for you.
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hiya,,,,my door chime is off and the central locking wont work off the fobs,,?
any help would be much appreicated,,, i have tried to relink fobs it goes through the process and stops working when i press the fob button twice right at the end of the process,, does this mean my receivers are broke?,, thanks
any help would be much appreicated,,, i have tried to relink fobs it goes through the process and stops working when i press the fob button twice right at the end of the process,, does this mean my receivers are broke?,, thanks
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From: OC
2 Qs
First off, thank you, Grace_Excel providing all the useful information! I have 2 questions:
1) I have a 2006, so I should get the KPU41788, instead of the KPU41805, correct?
2) Does this type of programming
method work with 2006?
Sorry if these sound like noob questions, and thank you in advance for your response!
1) I have a 2006, so I should get the KPU41788, instead of the KPU41805, correct?
2) Does this type of programming
Sorry if these sound like noob questions, and thank you in advance for your response!
You have a 2004 OEM FOB? The programming instruction you are using from this thread will not work. Try replacing your battery first and see if it's any help.
Originally Posted by Grace_Excel
Make sure you have the right Model.
Old 2004 FOB:
Visteon Model: 41848
FCC ID: KPU41805
IC: 4238A-12076
What you need to buy:
Visteon Model: 41525
FCC ID: KPU41788
IC: 4238A-41525
Originally Posted by Grace_Excel
Make sure you have the right Model.
Old 2004 FOB:
Visteon Model: 41848
FCC ID: KPU41805
IC: 4238A-12076
What you need to buy:
Visteon Model: 41525
FCC ID: KPU41788
IC: 4238A-41525
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From: OC
Thank you so much again! You are awesome! 
Also, for the uncut key you would have to go to a locksmith or a Mazda dealership to have it cut, correct?
Also, for the uncut key you would have to go to a locksmith or a Mazda dealership to have it cut, correct?
You can purchase a blank key blade in ebay(where I bought mine) and have a professional locksmith copy it. I went to Home Depot and the guy said he couldn't duplicate it. Or, head to the dealer and order one which will include the transponder pre-programmed that your car will recognize. I have success with my duplicate keys but I haven't had luck having mine recognize to work the transponder for my switchblade.
Last edited by Grace_Excel; Apr 5, 2013 at 01:51 PM.
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From: -
2. Turn from Lock position to On position 3 times.
3. Push button on Rear Driver's side Door Jamb 3 times. (Locks will start opening closing on their own)
4. Press the open or close button on each of your remotes 2 times each to associate them with your car.
1. Insert key.
2. Turn from Lock position to On position 3 times.
3. Push button on Rear Driver's side Door Jamb 3 times. (Locks will start opening closing on their own)
4. Press the open or close button on each of your remotes 2 times each to associate them with your car.
2. Turn from Lock position to On position 3 times.
3. Push button on Rear Driver's side Door Jamb 3 times. (Locks will start opening closing on their own)
4. Press the open or close button on each of your remotes 2 times each to associate them with your car.
Last edited by Grace_Excel; Apr 7, 2013 at 09:46 PM.