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X5 E53 (1999 - 2006)
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  #1  
Old 05-16-2007, 12:01 PM
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Zulu95 Zulu95 is offline
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Keys: The Full Story.

From the WDS for information.

Electronic Vehicle Immobilisation System EWS 3.3
The EWS 3.3 serves as an antitheft alarm system and enables the start of BMW vehicles.

A transponder chip is integrated in each of the vehicle keys. A ring coil is mounted about the ignition lock. The transponder chip is powered by the EWS3 control module via this coil, i.e. no battery is required in the key. The power supply and data transfer take place in the same way as a transformer between the ring antenna (coil) at the ignition lock and the transponder chip integrated in the key.

The key then sends data to the EWS3 control module. If this data is correct, the EWS3 enables the starter by way of a relay installed in the control module and additionally sends a coded start enable signal via a data link to the DME/DDE.

Components
Key with integrated transponder chip
A chip which can both transmit as well as receive (transponder) is integrated in the key. This transponder chip obtains its power from the field built up by the ring coil and uses it to communicate with the EWS3 control module. This means that no battery is necessary in the key for power supply. Every key or the transponder integrated in it is a unique part. The control module can also differentiate between the individual keys. The key transmits and receives data from/to the EWS control module.

If errors occur during communication between the EWS3 control module and the individual keys, these errors are stored in the fault memory - separate for each individual key.

Ring coil
The ring coil is mounted on the ignition lock and serves as an antenna for communication between the transponder chip (in the key) and control module.

EWS 3.3 control module
The EWS 3.3 control module communicates with the key mounted in the ignition lock. If the communication procedure is correct and the key has sent all data necessary for identification and start enable to the control module, the control module detects whether the key is valid and has been released for use. If this is the case, it releases the starter relay located in the control module and sends a coded enable signal via the data link to the DME/DDE.

The control module can manage a maximum of 10 keys allocated to the control module, i.e. a maximum of 6 replacement keys are possible.

The control module can identify the individual keys thus making it possible to disable/enable individual keys and to store fault codes for each individual key separately in the fault memory.

Data link to DME/DDE
The EWS3 control module sends a coded enable signal to the DME/DDE via the data link. The engine cannot be started before this signal has been transferred.

Engine control module (DME/DDE) with coded start enable input
The engine control module (DME/DDE) only enables ignition and fuel supply if a correct enable signal is received from the EWS control module.

EWS-DME/DDE interface
Identical variable codes are stored in the EWS 3.3 control module and in the DME/DDE control module. The value of these codes changes after every start procedure. Engine start is only enabled when the code sent by the EWS control module agrees with the code in the DME/DDE control module.

The control modules are allocated only during initial programming of the DME/DDE control module. The engine control module then adopts the basic code of the EWS control module.

Important

It is not possible to replace the DME/DDE or EW 3.3 control modules for test purposes!

In the case of certain faults, it is possible that the variable codes in both control modules deviate from each other. In these cases it is possible to calibrate the variable codes by means of the service function ”EWS - DME/DDE calibration”.

Influencing variables
P/N input for automatic transmission
Whether the vehicle is equipped with automatic transmission is defined in the coding.

On automatic vehicles, a start procedure is enabled by the EWS3 only if the selector lever is in position P or N.

The EWS3 control module receives the information with regard to the selector lever position twice:

Via a data link

Via the K-bus

If the information ”selector lever in position P or N” is sent only via the K-bus but, due to a fault, not via the data link, noticeable start delays within the range of 1 - 2 s can occur.

”Central locking secured” signal
The EWS3 control module receives this information via the K-bus.

If the EWS3 control module receives the ”central locking secured” signal from the general module, in ignition lock position 1 (terminal R), the EWS sends back a signal via the K-bus which unlocks the central locking.

Run-on time
Important

For safety reasons, the EWS3 control module features a code-dependent run-on time (approx. 10 seconds). It begins when the ignition lock is switched to 0 position. Within this run-on time start with any mechanically fitting key is enabled.

Key identification and start procedure
The following procedure takes place after inserting the vehicle key in the ignition lock:

The transponder in the key is powered via the loop antenna and sends the key data to the EWS3 control module.

The EWS3 control module then checks the key data to ensure it is correct and only then sends an enable signal to the engine management system and starter.

After the engine has started, the EWS3 control module generates new key data (change code) and transfers them to the transponder in the key.

A new variable code is also created and stored in the DME/DDE control module.

Changing individual components
Key
Replacement keys can be obtained from a sales point only via a BMW dealer where one of the 6 replacement keys fitting the vehicle is programmed. This key is not a copy of the lost key, but rather a new key.

A total of not more than 6 replacement keys suitable for the installed EWS control module can be made and handed over.

There is a noticeable start delay of 1 - 2 s when a new key is inserted in the ignition lock for the very first time. From then on, the start procedure should take place without delay.

Lost keys must be blocked by means of diagnosis. Refer to ”Special features of the diagnosis program”.

CAUTION!

Each request for a key is documented so that inquiries from insurance companies and authorities can be followed up.

Procedure for loss of all 10 keys
A new EWS control module is required if all 10 keys are lost.

By providing all the necessary data, it is possible to obtain a new EWS control module from a BMW dealer and the new transponder keys allocated to it with the previous mechanical key code.

EWS control module
The following procedure should be adhered to when replacing the EWS 3.3 control module:

Before replacing the EWS3 control module: Leave defective control module installed in vehicle and in the coding program (Encoding ZCS) select point ”1 New coding - 1 Replace control module - 1 Read out data from defective control module”. Coding data and vehicle-specific data is read out of the EWS control module with this part of the program and buffered in the MoDiC or DIS tester.

Now install new EWS 3 control module.

After replacing the control module: Encode new EWS 3 control module with coding program selection point ”1 New coding - 1 Replace control module - 2 Transfer data to new control module and encode control module”. The buffered data is now transferred and EWS - DME/DDE calibration is carried out.

Note

The procedure described above must be adhered to as all the data necessary for vehicle identification is also stored in the EWS control module. It will be necessary to do without the data readout from the old control module only if the EWS 3 control module no longer has diagnostic capabilities.

Proceed as follows in this case:

Install new EWS control module in the vehicle and encode with the encoding program and selection point ”1 New coding - 2 Re-encode control module”.

Then carry out matching with selection point ”EWS - DME/DDE calibration”.

In this procedure, the vehicle data necessary for automatic vehicle identification cannot be written to the EWS control module.

Replacement of engine control module (DME/DDE)
After replacing the engine control module, ”EWS - DME/DDE calibration” must be conducted with the coding program or in the diagnosis program.

Important

The ignition must then be switched off for at least 25 s.

Service functions
Disable/enable key
It is possible to disable or enable individual keys electronically via the diagnosis function (service functions).

Important

Electronically disabled means that both the starter as well as the engine control module are not released (enabled) for the start procedure. It should be borne in mind that an electronically disabled key still fits mechanically, i.e. all flaps, lids and doors can still be opened.

Display of keys used to date in this vehicle
Here, the display shows for each one of the 10 keys which can be managed by the EWS3 control module whether it has been recognized at least once by the EWS control module, i.e. it is possible to trace, also on older vehicles, how many keys have already been used in this particular vehicle.
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  #2  
Old 07-25-2007, 10:14 PM
Sir Binkley Sir Binkley is offline
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Question Key enquiry....

I just recently imported a 2004 330xi to Canada. It only had 1 remote key but I found the identical blank on EBay and had it cut locally. It programmed OK to the point where I can operate all locks and turn the ignition lights on but will not start the car. It obviously is not recognizing the transponder. My local (small) dealer says they don't require programming. They just order in preprogrammed keys from the VIN and charge you a small fortune. Did I waste my money or can a better equipped larger dealer program my new key?
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  #3  
Old 07-26-2007, 05:17 AM
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Zulu95 Zulu95 is offline
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Changing individual components
Key
Replacement keys can be obtained from a sales point only via a BMW dealer where one of the 6 replacement keys fitting the vehicle is programmed. This key is not a copy of the lost key, but rather a new key.

A total of not more than 6 replacement keys suitable for the installed EWS control module can be made and handed over.
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  #4  
Old 11-25-2011, 06:49 PM
wgreville wgreville is offline
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BMW key fiasco with immobilizer transponder chip

I fully understand the "security" involved with not allowing your car to start if you don't have a special transponder inside your key. HOWEVER, since I own three used BMW's in my family, and the family members seem to lose keys all the time, I am not in the mood to spend a crapload of money with this goofy immobilizer system each time.

A replacement key from the dealer is $900, and from a special locksmith is $490

I can get a blank BMW key for $9 on ebay. I can get it cut from most locksmiths for $29.

Now what do I do to get a new transponder chip? they are roughly 30 cents each on china websites that sell them to the dealers. The programming chip eeprom machine is $2000

IF I COPY THE TRANSPONDER CHIP exactly, how does the EWS know it's a different chip?

Also, the immobilizer system is not a good system to protect your car from being stolen, I strongly suggest you get a real alarm system to satisfy your ability to protect your car from theft. The immobilzer will not sound and alarm when the criminals are plugged into your car's computer creating a new key for it.

thanks,
wgreville
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  #5  
Old 12-14-2011, 02:59 PM
gcbm gcbm is offline
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RE: BMW key fiasco with immobilizer transponder chip

No need to spend $2000 on a programmer. I just purchased an AK-90 programmer on eBay for $150 which will do the trick.
cheers,
Ron
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  #6  
Old 12-14-2011, 06:05 PM
wgreville wgreville is offline
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hey, are you in Melbourne ?

So how do I copy the chip ?

Will the AK - 90 programmer make the ID on the chip a copy ?
or a NEW key id ?

Since we can only have 10 copies made per EWS, according to BMW.

hey, gcbm, are you in perhaps in MELB ? I am in Melbourne.


thanks,

wgreville
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  #7  
Old 12-15-2011, 12:54 AM
gcbm gcbm is offline
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Re AK-90 Programmer

The AK-90 reads the key data from the eeprom on the EWS (you need to remove and open the EWS module). From this you can recreate any key (new or old). The only issue is that if you recreate a current working key and use both, the rolling codes will get out of sync and one of the keys will no longer work.
Check out the link below for more info...


I'm located on the Gold Coast
cheers,
Ron
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  #8  
Old 12-15-2011, 12:55 PM
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petriej petriej is offline
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Quote:
Originally Posted by wgreville View Post
I fully understand the "security" involved with not allowing your car to start if you don't have a special transponder inside your key. HOWEVER, since I own three used BMW's in my family, and the family members seem to lose keys all the time, I am not in the mood to spend a crapload of money with this goofy immobilizer system each time.
...
thanks,
wgreville
Easy fix: Replace family members.

But seriously, do something about them losing keys. I've lost my keys exactly zero times.
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Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
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this jared guy sounds intimidating lol.
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  #9  
Old 03-28-2012, 04:58 PM
tamw tamw is offline
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Question

Bought a used BMW series 5 and it is missing spare/service key. Dealership informed me to come over with the two master keys I have in order to disable the missing key. Now, I have a question. Disabling this key would mark the corresponding memory entry as invalid. This will disable engine from turning on, however would that also disable the car from being opened???
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  #10  
Old 03-28-2012, 05:27 PM
gcbm gcbm is offline
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Re keys

Quote:
Originally Posted by tamw View Post
Bought a used BMW series 5 and it is missing spare/service key. Dealership informed me to come over with the two master keys I have in order to disable the missing key. Now, I have a question. Disabling this key would mark the corresponding memory entry as invalid. This will disable engine from turning on, however would that also disable the car from being opened???
This is what the dealer will do;

Disable the missing key in the EWS - stops the lost key from starting engine.
They will want the two remaining keys to make sure that they disable the correct one.

If the key you lost had a remote opening etc then they would also;

Do the key sync procedure with the remaining remote keys - stops the missing key from remote operation (if you search the forums you will find how to do this yourself).
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  #11  
Old 03-28-2012, 06:03 PM
tamw tamw is offline
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thanks gcbm for the info

just got off a discussion with the dealership and they said otherwise. The sales manager said that he would stop the car engine from turning on, however the disabled key can still unlock the car doors???

not sure he was a technical person, however I refused his solution to my missing key problem.

however, if this is possible, I will accept it as a solution to my problem....

thanks once more...
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  #12  
Old 03-28-2012, 06:15 PM
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petriej petriej is offline
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Quote:
Originally Posted by tamw View Post
thanks gcbm for the info

just got off a discussion with the dealership and they said otherwise. The sales manager said that he would stop the car engine from turning on, however the disabled key can still unlock the car doors???

not sure he was a technical person, however I refused his solution to my missing key problem.

however, if this is possible, I will accept it as a solution to my problem....

thanks once more...
Right.

Without changing the locks, the physical part of the key can turn the locks and open the doors. The ignition cylinder in the steering column has a system called EWS that talks to a chip in the key. If the dealer disables that missing key, if that key is ever found, it will not be able to start the car, but it can still open the doors manually. There is no EWS at the doors, only the ignition.

Not sure how much more we can explain it. Basic lock and key stuff here, mastered millennia ago...
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Quote:
Originally Posted by hornhospital View Post
Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
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  #13  
Old 03-28-2012, 06:28 PM
gcbm gcbm is offline
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Re Key

Quote:
Originally Posted by tamw View Post
thanks gcbm for the info

just got off a discussion with the dealership and they said otherwise. The sales manager said that he would stop the car engine from turning on, however the disabled key can still unlock the car doors???

not sure he was a technical person, however I refused his solution to my missing key problem.

however, if this is possible, I will accept it as a solution to my problem....

thanks once more...
The disabled key will still work the door locks manually. The only way to fix that is to switch the locks. But if the lost one had a remote doing the resync process switching the existing key(s) through the ignition will disable remote locking / unlocking.

Last edited by gcbm; 03-29-2012 at 12:01 PM. Reason: poor spelling
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  #14  
Old 03-28-2012, 07:10 PM
tamw tamw is offline
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thanks!

greatly appreciated!
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  #15  
Old 09-16-2012, 01:51 PM
MiniCooper2002 MiniCooper2002 is offline
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I wouldn't waste your money. I'm extremely frustrated with my AK90. It does a decent job reading the keys and IMU for my MiniCooper 2002, but it cannot program a PCF7930AS transponder chip that is already used. OK, so the answer is to get a new one, right? Well, try doing it and you'll be frustrated too! NOBODY seems to sell these things in reasonable quantities or for a reasonable price. As a result, I decided to try to use an emulator too. That was almost as bad as the AK90 quest, maybe worse! The Chinglish directions are misleading and confusing. I just gave up on that too. I think I'll have to swallow my pride and go to the dealer to get a key. I'm not happy about it at all but I need a spare key for my (new to me) car I bought. I learned a tough lesson though.... NEVER buy a car with only one key!
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  #16  
Old 09-16-2012, 03:53 PM
gcbm gcbm is offline
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Don't give up on the AK90 yet!

You need to be aware that a transponder chip can only be programmed once and if the process fails the chip is then useless. Also the original key (on the e46 anyway) has a soldered transponder chip while the clone keys use one that is not attached to the circuit board (so the chips will have different numbers but they function the same).

Try the following seller on ebay from who I purchased e46 blanks. He was extremely helpful and knows what he is taking about. The listing below is for a blank mini key with new transponder chip ($69) but if you are just after the chip he could probably do that as well.
http://www.ebay.com.au/itm/MINI-BRAN...item415ee2f915

If the link is not active search ebay for seller artiway.
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  #17  
Old 09-17-2012, 10:29 PM
MiniCooper2002 MiniCooper2002 is offline
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Quote:
Originally Posted by gcbm View Post
You need to be aware that a transponder chip can only be programmed once and if the process fails the chip is then useless. Also the original key (on the e46 anyway) has a soldered transponder chip while the clone keys use one that is not attached to the circuit board (so the chips will have different numbers but they function the same).

Try the following seller on ebay from who I purchased e46 blanks. He was extremely helpful and knows what he is taking about. The listing below is for a blank mini key with new transponder chip ($69) but if you are just after the chip he could probably do that as well.
http://www.ebay.com.au/itm/MINI-BRAN...item415ee2f915

If the link is not active search ebay for seller artiway.
Thank you for your response! It is the first I have actually had from anyone on the elusive subject of transponders (which is part of the frustration). I am aware that you cannot reprogram the chips. I actually bought 'new' keys, but I don't know if they got corrupted when i tried a different programmer or if they were sold to me used. Whatever the case, that was a miserable failure.

I decided to contact your link, however. Although he wasn't able to help me, I poked around a little more and learned that the PCF7935AS should be compatible with the PCF7930AS. I say "should" because although the datasheets say this is the case, some of the dealers say it isn't so. I have decided to go out on a limb and invest *another* $28 to get 6 of these, however, in an attempt to see if the AK90 can truly produce a usable key for me. If so, I'll be a happy camper.
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  #18  
Old 09-18-2012, 12:59 AM
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Anyone stateside find a place to get the blanks cut?
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Old 09-18-2012, 09:23 AM
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I got two keys from the dealer for less than $200. What's the big problem? They even program them for free in less than 5 minutes. There are a few things the dealer really is the only good place for, and keys are one of them.
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Quote:
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Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
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  #20  
Old 10-02-2012, 07:41 PM
mda185 mda185 is offline
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Quote:
Originally Posted by petriej View Post
I got two keys from the dealer for less than $200. What's the big problem? They even program them for free in less than 5 minutes. There are a few things the dealer really is the only good place for, and keys are one of them.
The big deal is that not all dealers are that helpful or affordable. The two closest dealers to me want $250 for a new key and another $135 to program my keyless entry system to recognize them. I can do the keyless entry setup but not all users can.
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  #21  
Old 10-18-2012, 01:02 PM
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Quote:
Originally Posted by petriej View Post
I got two keys from the dealer for less than $200. What's the big problem? They even program them for free in less than 5 minutes. There are a few things the dealer really is the only good place for, and keys are one of them.
Which dealer is that? I went to Peter Pan BMW in San Mateo/Burlingame, and they said a key is at least 200+, and the programming is 180.
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Old 10-18-2012, 01:06 PM
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Quote:
Originally Posted by hornhospital View Post
Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
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1999 M3 Cabrio TiAg Metallic/Dove Grey/Black 5 Speed Manual
-------------------------------------------------------------------
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2004 645Ci Mineral Silver Metallic/Black 6MT RIP 04/2011
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  #23  
Old 10-18-2012, 02:11 PM
sunny5280 sunny5280 is offline
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Which dealer is that? I went to Peter Pan BMW in San Mateo/Burlingame, and they said a key is at least 200+, and the programming is 180.
Be aware programming is merely programming the remote locking and unlocking. Something the owner can do themselves. The programming has nothing to do with enabling the key to operate the vehicle. That's something only BMW can do. And by BMW I am not referring to the dealers.
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  #24  
Old 10-18-2012, 02:18 PM
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... That's a little misleading...

The physical part of the key is based on the locks installed on the vehicle. BMW uses the VIN to get this pattern and put it on a key. They also have a chip inside the key, but they're individual to the key. When the dealer gets your new key from Germany, they perform a procedure, using the old key, to tell the car to use this new key as well, for VKM. I watched them perform this procedure, and it could be done on your own. It required no tools other than the working key, and the new key. Since it was free, and they performed this before even giving me the key, I didn't care.
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Quote:
Originally Posted by hornhospital View Post
Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
2005 X5 4.8is Le Mans/Black/6spd Steptragic
1999 M3 Cabrio TiAg Metallic/Dove Grey/Black 5 Speed Manual
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  #25  
Old 10-18-2012, 05:27 PM
mda185 mda185 is offline
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Location: NJ
 
Join Date: Aug 2012
Posts: 476
Mein Auto: 95 525iT w/S52, 03 530i
Quote:
Originally Posted by petriej View Post
... That's a little misleading...

The physical part of the key is based on the locks installed on the vehicle. BMW uses the VIN to get this pattern and put it on a key. They also have a chip inside the key, but they're individual to the key. When the dealer gets your new key from Germany, they perform a procedure, using the old key, to tell the car to use this new key as well, for VKM. I watched them perform this procedure, and it could be done on your own. It required no tools other than the working key, and the new key. Since it was free, and they performed this before even giving me the key, I didn't care.
This is not 100% correct. There are two separate functions the wireless keys perform. The ability to start the car requires that the code emitted by a chip in the key match a code already stored in the EWS and DME computers. All BMWs are shipped with a total of 10 key codes stored in the EWS and the DME computers. These codes are a function of your car's VIN. When you buy a new key from BMW, their parts dept looks up your VIN to see how many of the 10 key codes have been issued. These codes refer to the identification signal emitted by the chip in the key. The chip can only be programmed once and it takes a special electronic coder to perform this function. Once 10 keys have been issued for your car, BMW dealer will tell you that you need to purchase a new EWS module and have your DME recoded. They will most likely want to charge $1000 or more for this service. There are people out there that can provide this service for less. One that I know of is RPM Motorsports in Canada. They have a web site.

The other function that does require dealer or owner setup is getting the locking and alarm system to recognize the wireless signal emitted by the keys. The dealer only needs your old key(s) when setting up the keyless entry and alarm system to recognize the new key. If the old keys are not re-entered at the same time as the new key, the system will only recognize the new key.
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