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  #1  
Old 08-27-2019, 06:56 PM
ElectricPotato ElectricPotato is offline
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Mein Auto: 2012 BMW X5 XDrive 35i
Keyfob stopped working

I have a 2012 X5 with comfort access.
A couple days ago my keyfob stopped working. It won't lock, unlock, etc., and I need to insert it to start the car.
I bought new CR2032 batteries today replaced it to no avail. Replaced it again and still no luck.
I found a thread here where users had success repeatedly plugging, unplugging, starting, and stopping. It hasn't helped.
Now I'm leaning towards it being a completely dead keyfob or perhaps a blown fuse in the car.
I don't have a spare keyfob to try. I bought it used and it only came with one.
Anyone know if there might be a fuse in the car to look at?

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  #2  
Old 08-28-2019, 03:08 AM
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It is unlikely a fuse on so high level an application as CA. www.NewTIS.info. Best wishes.
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Old 08-28-2019, 07:07 AM
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Agree with Doug. Chances are you need a replacement FOB.

Side note: Have you tried testing the signal on your FOB? A lot of places that sale those CR2032 and other flat cell batteries will normally have a signal tester like the parts store and most likely a locksmith shop if there is one near. At least you would know if you have a signal emitting or not.
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Old 08-28-2019, 07:56 AM
ElectricPotato ElectricPotato is offline
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No, I haven't tested the signal. I'll look into that. I can't say I've ever noticed a place that can test that but it totally makes sense. A quick google shows its using 315mhz.

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Old 08-28-2019, 08:05 AM
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ui

Quote:
Originally Posted by ElectricPotato View Post
No, I haven't tested the signal. I'll look into that. I can't say I've ever noticed a place that can test that but it totally makes sense. A quick google shows its using 315mhz.

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Quick google search found one I've seen particularity in AutoZone locations. Put out by Energizer. Batteries hang for sale while there is a signal tester on the same display board. Pretty sure it picks up all frequencies.
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  #6  
Old 08-29-2019, 05:27 AM
ElectricPotato ElectricPotato is offline
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The plot thickens.
I got in the car this morning, tried a few things to see if the problem is still there. It is.
I put the key in, started the car and noticed my AC is set to 70. I keep it at 68.
Then pressed my radio preset. It says not assigned.
Whaaat???

So I'm thinking there's a good chance this is related to my keyfob problem.
Maybe the car battery is the culprit?

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  #7  
Old 08-29-2019, 05:40 AM
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Personal Profiles are kept in the key-fob.
"Personal Profile settings
The following functions and settings can be stored in a profile.
More information on the settings can be found under:
***9655; Assigning the programmable memory but***8208; tons, refer to page 22.
***9655; Response of the central locking system when the car is being unlocked, refer to page 30.
***9655; Automatic locking of the vehicle, refer to page 33.
***9655; Driver's seat, exterior mirror and steering wheel positions*, refer to page 53.
***9655; Settings for the display on the Control Dis***8208; play and in the instrument cluster:
***9655; 12h/24h clock format, refer to page 79.
***9655; Date format, refer to page 79.
***9655; Brightness of the Control Display, refer
to page 80.
***9655; Language on the Control Display, refer
to page 80.
***9655; Units of measure for fuel consumption, distance covered/remaining distances, and temperature, refer to page 80.
***9655; Show visual warning for the Park Distance Control PDC*, refer to page 111.
***9655; Show visual warning for Top View*, refer to page 114.
***9655; Show Side View*, refer to page 116.
***9655; Backup camera*:
***9655; Function selection, refer to page 113.
***9655; Type of display, refer to page 114.
***9655; Lane departure warning*: last setting, on/
off, refer to page 93.
***9655; Head-up Display*: selection, brightness and
position of the display, refer to page 117.
***9655; Light settings:
***9655; Triple turn signal activation, refer to
page 66.
***9655; Welcome lamps, refer to page 81.
***9655; Headlamp courtesy delay feature, refer to page 81.
***9655; Daytime running lights, refer to page 82.
***9655; High-beam Assistant*, refer to page 83.
***9655; Automatic climate control with 2-zone con***8208; trol: settings, refer to page 120.
***9655; Navigation:
***9655; Voice activation, refer to page 163.
***9655; Route criteria, refer to page 161.
***9655; Map view settings, refer to page 164.
***9655; Entertainment:
***9655; Tone control, refer to page 172.
***9655; Radio, stored stations, refer to page 180.
***9655; CD/multimedia, audio source listened to last, refer to page 181.
***9655; Telephone: volume, refer to page 220."
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.

Last edited by Doug Huffman; 08-29-2019 at 05:41 AM.
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  #8  
Old 08-29-2019, 09:28 AM
ard ard is offline
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im not sure the actual data or all those settings is stored ON the fob, and transferred TO the car at each start....


Quote:
Originally Posted by Doug Huffman View Post
Personal Profiles are kept in the key-fob.
"Personal Profile settings
The following functions and settings can be stored in a profile.
More information on the settings can be found under:
***9655; Assigning the programmable memory but***8208; tons, refer to page 22.
***9655; Response of the central locking system when the car is being unlocked, refer to page 30.
***9655; Automatic locking of the vehicle, refer to page 33.
***9655; Driver's seat, exterior mirror and steering wheel positions*, refer to page 53.
***9655; Settings for the display on the Control Dis***8208; play and in the instrument cluster:
***9655; 12h/24h clock format, refer to page 79.
***9655; Date format, refer to page 79.
***9655; Brightness of the Control Display, refer
to page 80.
***9655; Language on the Control Display, refer
to page 80.
***9655; Units of measure for fuel consumption, distance covered/remaining distances, and temperature, refer to page 80.
***9655; Show visual warning for the Park Distance Control PDC*, refer to page 111.
***9655; Show visual warning for Top View*, refer to page 114.
***9655; Show Side View*, refer to page 116.
***9655; Backup camera*:
***9655; Function selection, refer to page 113.
***9655; Type of display, refer to page 114.
***9655; Lane departure warning*: last setting, on/
off, refer to page 93.
***9655; Head-up Display*: selection, brightness and
position of the display, refer to page 117.
***9655; Light settings:
***9655; Triple turn signal activation, refer to
page 66.
***9655; Welcome lamps, refer to page 81.
***9655; Headlamp courtesy delay feature, refer to page 81.
***9655; Daytime running lights, refer to page 82.
***9655; High-beam Assistant*, refer to page 83.
***9655; Automatic climate control with 2-zone con***8208; trol: settings, refer to page 120.
***9655; Navigation:
***9655; Voice activation, refer to page 163.
***9655; Route criteria, refer to page 161.
***9655; Map view settings, refer to page 164.
***9655; Entertainment:
***9655; Tone control, refer to page 172.
***9655; Radio, stored stations, refer to page 180.
***9655; CD/multimedia, audio source listened to last, refer to page 181.
***9655; Telephone: volume, refer to page 220."
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Alignment here: The Definitive Alignment Thread

OE is Original Equipment aka 'BMW Original Parts' aka 'What you buy at the BMW dealer with a BMW label'

OEM is Original Equipment Manufacturer... EITHER the company that made the OE part or.... A part this is identical to the OE part, but is sold by the OEM under their own label


OEM is not what BMW sells


http://www.bimmerzone.com/category/T...ricks_OEM.html

https://www.turnermotorsport.com/t-OEvsOEM
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  #9  
Old 08-29-2019, 04:23 PM
ElectricPotato ElectricPotato is offline
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Just stopped at auto zone. The keyfob failed the test. No signal detected.

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  #10  
Old 08-29-2019, 05:10 PM
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2010xdrive35d 2010xdrive35d is offline
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Quote:
Originally Posted by ElectricPotato View Post
Just stopped at auto zone. The keyfob failed the test. No signal detected.

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If it was with a brand new battery, which it sounds like it was, then it's likely the FOB is dead. The signal emitter part anyway. At least it still starts the car. Should you get a new key, then this could be a backup.
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Old 08-29-2019, 05:23 PM
luigi524td luigi524td is offline
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Exclamation Key FOB issue

Quote:
Originally Posted by ElectricPotato View Post
Just stopped at auto zone. The keyfob failed the test. No signal detected.

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Sometimes when I'm in a rush to replace those button batteries in our collection of watches I put them in UPSIDE DOWN ... Is that possible?? And Once in a blue moon I fail to check the expiration / life expectancy date on the bubble pack ... I once bought a pair that were on an end cap in a store ... got home to find they were 3+ years old!!

Last point > BMW car batteries that are starting to fail cause all sorts of issues - setting off alerts and altering settings etc etc. First time this happened to me I thought my car was possessed

Might be worth investigating that too! Good luck
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Old 08-29-2019, 05:46 PM
ElectricPotato ElectricPotato is offline
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I've actually replaced the battery 3 times already. Got a new pack of Duracells. Tried one, no luck. Had a Maxell at home so I tried that. Got my fluke meter out. It was 2.96v. Checked another new Duracell and it was 3.2v so put that one in and again, no luck.
I checked polarity and yes, positive side is up. I looked at the contacts to double check and yes, if you put it in with negative side up there can be no contact with it because they touch the battery at the sides, which is positive and on the bottom, which is negative when correctly installed.
I even tried it with the back cover off, pressing the battery inwards a bit to make sure it was making a solid connection with both positive and negative contacts.
So, I guess I'm due for a trip to BMW to shell out $350 for a new fob.
Can a mom and pop hook me up with a new one for less? I know the new one has to be coded while connected to the car but don't know if anyone besides BMW can do that.

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  #13  
Old 08-29-2019, 06:18 PM
luigi524td luigi524td is offline
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Exclamation ?? FOB Replacement time ??

Quote:
Originally Posted by ElectricPotato View Post
I've actually replaced the battery 3 times already. Got a new pack of Duracells. Tried one, no luck. Had a Maxell at home so I tried that. Got my fluke meter out. It was 2.96v. Checked another new Duracell and it was 3.2v so put that one in and again, no luck.
I checked polarity and yes, positive side is up. I looked at the contacts to double check and yes, if you put it in with negative side up there can be no contact with it because they touch the battery at the sides, which is positive and on the bottom, which is negative when correctly installed.
I even tried it with the back cover off, pressing the battery inwards a bit to make sure it was making a solid connection with both positive and negative contacts.
So, I guess I'm due for a trip to BMW to shell out $350 for a new fob.
Can a mom and pop hook me up with a new one for less? I know the new one has to be coded while connected to the car but don't know if anyone besides BMW can do that.

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BUMMER - guess this one wasn't a simple solution :-(

IMHO the place to go for a replacement FOB for your BMW is a BMW Dealer Service / Parts Center. If you search the forum you'll find advice regarding "price" ... you'll also need to provide documentation that you are the owner of the car - registration, etc. The FOB they deliver will be SPECIFICALLY FOR YOUR BMW. I've read that some dealers charge a fee for initializing the FOB to your car - I've never had to do this but I've read that it's not that complicated and might be a DIY ... try to search that info out on the forum ... you'll find established members very helpful. Good luck !!
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Last edited by luigi524td; 08-29-2019 at 06:20 PM.
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Old 08-29-2019, 06:27 PM
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2010xdrive35d 2010xdrive35d is offline
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Quote:
Originally Posted by ElectricPotato View Post
I've actually replaced the battery 3 times already. Got a new pack of Duracells. Tried one, no luck. Had a Maxell at home so I tried that. Got my fluke meter out. It was 2.96v. Checked another new Duracell and it was 3.2v so put that one in and again, no luck.
I checked polarity and yes, positive side is up. I looked at the contacts to double check and yes, if you put it in with negative side up there can be no contact with it because they touch the battery at the sides, which is positive and on the bottom, which is negative when correctly installed.
I even tried it with the back cover off, pressing the battery inwards a bit to make sure it was making a solid connection with both positive and negative contacts.
So, I guess I'm due for a trip to BMW to shell out $350 for a new fob.
Can a mom and pop hook me up with a new one for less? I know the new one has to be coded while connected to the car but don't know if anyone besides BMW can do that.

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We just recently had a discussion about this.

I'm just sharing with you what I know and have seen. My family, parents, own a locksmith business. A guy works through the business and he's an automotive locksmith. He has the machine that cuts the door key, and another machine that programs keys for BMW's. Only drawback is he typically just does a key that has to be inserted into the dash to start the car. It's more work and a more expensive key to make one that works as a CA key. So he sticks with just a programmed key to start the car and unlock the doors via remote. He does that type of key here for $85.

I haven't gotten a second key made for myself yet, but I promised I would video the process and upload it so everyone can see it's possible.

Call around your area and ask if the local locksmiths have the equipment to do it. It exists, but it's very expensive.
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Old 08-29-2019, 09:17 PM
ard ard is offline
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Some state have unique laws around key replacement costs.

But some people keep their state secret...


Mashman has some good inputs:

https://www.bimmerfest.com/forums/sh...d.php?t=907022

https://www.bimmerfest.com/forums/sh...d.php?t=903551
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Alignment here: The Definitive Alignment Thread

OE is Original Equipment aka 'BMW Original Parts' aka 'What you buy at the BMW dealer with a BMW label'

OEM is Original Equipment Manufacturer... EITHER the company that made the OE part or.... A part this is identical to the OE part, but is sold by the OEM under their own label


OEM is not what BMW sells


http://www.bimmerzone.com/category/T...ricks_OEM.html

https://www.turnermotorsport.com/t-OEvsOEM
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Old 08-30-2019, 09:10 AM
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Quote:
Originally Posted by 2010xdrive35d View Post
... I promised I would video the process and upload it so everyone can see it's possible.

Call around your area and ask if the local locksmiths have the equipment to do it. It exists, but it's very expensive.
Just an FYI in case someone is dying to see this done before you can upload a video...just go to YouTube and do a simple search. The procedure to duplicate a key for a BMW using an AK90 etc has been posted already for the old style remote key iterations with EWS II/EWS III. The next gen keys are probably being "cracked/hacked" as I type this.

But you as already mentioned...if you're going outside the BMW dealership...you need to know what & how it is done so that you can ask the appropriate questions of the keysmith that is claiming to make you a new key...so that you don't end up with a cute little worthless BMW trinket.
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Old 08-30-2019, 09:33 AM
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Quote:
Originally Posted by QSilver7 View Post
But you as already mentioned...if you're going outside the BMW dealership...you need to know what & how it is done so that you can ask the appropriate questions of the keysmith that is claiming to make you a new key...so that you don't end up with a cute little worthless BMW trinket.
Right! I can't afford a cute little worthless trinket.. Even if it's BMW :
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Old 08-30-2019, 12:31 PM
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Quote:
Originally Posted by 2010xdrive35d View Post
Right! I can't afford a cute little worthless trinket.. Even if it's BMW :
I was somewhat in the same boat...
Read the full thread, you may find your solution with this guy...https://www.bimmerfest.com/forums/sh...php?p=13041307
Especially post #13!
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Old 08-30-2019, 12:43 PM
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2010xdrive35d 2010xdrive35d is offline
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Quote:
Originally Posted by BimmurBrothor View Post
I was somewhat in the same boat...
Read the full thread, you may find your solution with this guy...https://www.bimmerfest.com/forums/sh...php?p=13041307
Especially post #13!
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Looks like this applies to previous generation. Is that thread pertaining to the 2007-2013 E70?
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Old 08-30-2019, 09:58 PM
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Quote:
Originally Posted by 2010xdrive35d View Post
Looks like this applies to previous generation. Is that thread pertaining to the 2007-2013 E70?
Perhaps, the main point here is that there is a point of contact for a service that repairs your fob...

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  #21  
Old 08-31-2019, 12:29 AM
Aplombron1 Aplombron1 is offline
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You will need a replacement FOB.
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  #22  
Old 09-02-2019, 09:20 AM
Milliwatt Rob Milliwatt Rob is offline
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Reopen the FOB, make sure you inserted the battery with the correct polarity (not upside down).
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  #23  
Old 09-02-2019, 01:33 PM
ElectricPotato ElectricPotato is offline
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Quote:
Originally Posted by Milliwatt Rob View Post
Reopen the FOB, make sure you inserted the battery with the correct polarity (not upside down).
That was already addressed earlier in this thread.

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  #24  
Old 09-03-2019, 03:58 PM
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This guy can fix most BMW key fobs for $50. He fixed mine (E39 diamond fob) and it now works perfectly.
[email protected] Email him for details.
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Old 09-03-2019, 07:48 PM
X5BIMMER65 X5BIMMER65 is offline
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I have a 2015 x5 out of warranty. I looked online for a new key fob after obvious attempts to fix my. Prices all over the map 400-700 dollars. The dealer scanned it, basically said it was toast. Ended up costing 300 for a new fob that worked. Parts guy, said a lot of people try after market solutions only to buy a new one from BMW. Sometimes the dealer is best.
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