A4 B6 2004 the only RFID chip BROKEN! Please help.

[BarnaBK]

Right, Im a fool.
I wanted to remove the RFID chip from my only working fob, to place it in a new one as remote wasn't working. I think it was glued in, as I tried to pick it it just snapped.
I open the door with the key, the alarm turns on, key in ignition in SAFE mode, starts and dies straight away, alarm goes on until I lock the door and leave it in peace.
Car is pretty much dead right now.

I have VCDS Lite Registered, and the cable, I did fob sync before, but I guess this is a more difficult case.

What are my options? Im sure I can order the RFID chip on obay, but that would need reprogramming to the car.
Im the 4th owner, no way I can get the immobiliser PIN code from previous owners.

Obviously Id try everything before calling a locksmith, stealership etc. I have some knowledge on PC-s, if there is a good guide somewhere.

Please help.

[fR3ZNO]

You're gonna need to do some searching, it's been covered before. But this is doable on your own. You will need a need a new IMMO chip. But it might be easier to just get another keyfob on eBay/whatever that comes with a new IMMO chip and swap the keyblade or have it cut by a locksmith.

Next you'll need to download a copy of VAG EEPROM to extract the SKC's from your cluster. Here's a google drive link that has a (working) copy of VAG EEPROM: Clicky Click

Then after that point you can do the keyfob matching process as outline by Rosstech with VCDS:

[BarnaBK]

You're gonna need to do some searching, it's been covered before. But this is doable on your own. You will need a need a new IMMO chip. But it might be easier to just get another keyfob on eBay/whatever that comes with a new IMMO chip and swap the keyblade or have it cut by a locksmith.

Next you'll need to download a copy of VAG EEPROM to extract the SKC's from your cluster. Here's a google drive link that has a (working) copy of VAG EEPROM: Clicky Click

Then after that point you can do the keyfob matching process as outline by Rosstech with VCDS:

Can I use VAG EEPROM with VAG-COM cable? I think this soft on the link you shared doesnt actually retrieve SKC but it is changing it to a preset SKC that is installed with the .bin file.. Or not?

[hightime80]

Vag eeprom indeed pulls the skc not put it to some "preset" number. It is the skc of the ecu in the car and it is good forever. If you have a "real" vagcom cable that is black you need to put it in dumb mode. If you have an generic blue cable it should work as long it is the fidi chip based and might be other one which I can't recall off the top of my head.

[EuroxS4]

Your gonna need a new immo pill. IIRC it should be a megamos48. Then pull pin from cluster using some software and adapt using skc.

[BarnaBK]

Thanks all, I will look into finding SKC nr somehow.

Is there a trick not to trigger the alarm? It will be kind of annoying for the neighbors, I got to sit there with alarm on while I get SKC nr and reprogram keys

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[BarnaBK]

I found someone selling two remotes with the matching ignition cylinder and drvier side door lock cylinder, I'd would rather go with this than getting new remotes, chips, cut new blades etc.

Plan is:
-Open door with old key, open hood, disconnect battery so alarm doesn't go crazy.
-Take off steering wheel, replace ignition cylinder, so I can turn ignition on for the software with new keys to reprogram
-Battery back on
-Straight on the software to pull SKC code
-Use SKC code to reprogram new keys

Im trying to reduce the time of the alarm going on...

Would it work this way?

The remotes and cylinders are from a matching model (my model: 2004 A4 B6 1.8T BFB, donor: 2001-2004 AUDI A4 B6 2.5 TDI V6 BFC) Would there be any other interfering with the ECU or immobilizer?IMG_20200614_103053.jpeg

[EuroxS4]

So there a whole lot of wrong with that approach as the ECU is the immobilizer master. So you will need to change immo id and vin in the ecu,and cluster and vin in hvac head to match the keys.Then you you will need to adapt all keys to comfort module.On top of that all the work you need to do to install the parts. Also the picture you posted looks like your missing the trunk lock cylinder and rear folding seat lock cylinders and the glove box as well. Also it doesnt make sense to me. Why not spend $5 on a immo pill and adapt to have a running car. It make no sense to change everything. You just needs to change the chip. Theres no need to cut a new key just because the immo pill shattered.

[BarnaBK]

So there a whole lot of wrong with that approach as the ECU is the immobilizer master. So you will need to change immo id and vin in the ecu,and cluster and vin in hvac head to match the keys.Then you you will need to adapt all keys to comfort module.On top of that all the work you need to do to install the parts. Also the picture you posted looks like your missing the trunk lock cylinder and rear folding seat lock cylinders and the glove box as well. Also it doesnt make sense to me. Why not spend $5 on a immo pill and adapt to have a running car. It make no sense to change everything. You just needs to change the chip. Theres no need to cut a new key just because the immo pill shattered.

Mine its a Saloon, there is no trunk cylinder, no folding seats either, I dont mind about glovebox.

I had only one key that had matching chip in it but remote wasn't working. I had a B7 remote that I synchronized, but the remote itself is different, there is no space for a chip.

I either do the job above, or find 2 separate remotes, do the chip replacement in both, get blades cut for both and end up spending more. This bundle above is for a very good price.

So I cant just install the cylinders and retrieve SKC code, then reprogramme both keys with VCDS?? New cylinder would match the key blades obviously, and sensor will be also there so as the chips in the keys, right?

[EuroxS4]

Cant reprogram used keys as immo pill is a one shot deal. Used keys wont work unless immo pill is new or you change immo id and vin in ecu and cluster to match used keys. To do that you need a tool that will decrypt rfid signal from immo pill in used keys in order to be able to edit immo id in ecu and cluster.Then you will need to correct checksum in 95040 eeprom. I dont think youll be able to adapt using this method. Too much work,time and money spent of software and hardware. Or you buy the set and put in 2 new immo pills and adapt. Or if your keeping b6 remote you buy a new remote and swap the blade. They have a 1mm roll pin so you can swap the blade. No need to cut or anything. Plenty of options out there personally if it was me it wouldnt be worth my time doing all that. I would just get a new immo pill or upgrade to a new b7 remote and have the blade cut to match and be done with it.

[BarnaBK]

Cant reprogram used keys as immo pill is a one shot deal. Used keys wont work unless immo pill is new or you change immo id and vin in ecu and cluster to match used keys. To do that you need a tool that will decrypt rfid signal from immo pill in used keys in order to be able to edit immo id in ecu and cluster.Then you will need to correct checksum in 95040 eeprom. I dont think youll be able to adapt using this method. Too much work,time and money spent of software and hardware. Or you buy the set and put in 2 new immo pills and adapt. Or if your keeping b6 remote you buy a new remote and swap the blade. They have a 1mm roll pin so you can swap the blade. No need to cut or anything. Plenty of options out there personally if it was me it wouldnt be worth my time doing all that. I would just get a new immo pill or upgrade to a new b7 remote and have the blade cut to match and be done with it.

Now it makes sense, I dint know its one shot deal.
Sounds like a long complicated process.
Its hard to find B6 or B7 keys round here, there are people who sell B6 used remotes and price of two will be still much higher than the set above.

Scrap my existing fob from this plan, remote doesn't work.
So as you said, I will buy the set and two pills, and adapt them. I dont mind replacing the cylinder to use the original key blades, I just did the cruise control retrofit, pretty much same area to work on.

So replacing cylinders, add new pills, retrieve SKC and adapt in VCDS should work fine?

While we are here, do you know a good working method to retrieve SKC?
Again, I am trying to do this cheap as possible.
I have VCDS Lite Registered, VAG KKL 409.1 generic cable (blue OBD2 type) that worked for things like programming the Cruise Control, etc.,
as for soft downloaded VAG Commander 2.5 Full and VAG EEPROM Programmer 1.19.

[EuroxS4]

VAG EEPROM Programmer 1.19 and a cheap cable will should work for a diyer. Just need to read dash encrypted and save a backup. Then decrypt if making any chances. program will give you the SKC immo id and vin.

[BarnaBK]

VAG EEPROM Programmer 1.19 and a cheap cable will should work for a diyer. Just need to read dash encrypted and save a backup. Then decrypt if making any chances. program will give you the SKC immo id and vin.

Great help!

Do you know a way to keep alarm off? I will have to sit in the car while I retrieve SKC and reprogram keys while alarm go crazy?

Will the VCDS Lite and VAG EEPROM work with the key and broken pill? It throws it in safe mode.

[Cybersombosis]

Unplug the siren? Can you not use your key to turn the alarm off from the door or the trunk?

[BarnaBK]

Unplug the siren?

Sounds obvious I thought it would be too easy to be true...
There is an inbuilt "beeper" not really a siren.
Its a factory alarm system. It beeps loudly but it doesn't sound the horn.
Can I disconnect that?

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[EuroxS4]

Nope beeper has built in battery. Will still go off. Leave it beeping should time out after a minute or two.

[BarnaBK]

Nope beeper has built in battery. Will still go off. Leave it beeping should time out after a minute or two.

Okay.
Thanks for help, I'll give it a go. Fingers crossed, wanna avoid stealership.

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[BarnaBK]

Would this fob and chip fit a B6? It has ID48 chip apparently, 434 mhz remote.

My only fob is also aftermarket apparently because I cant find any part number on it, im pretty lost, dont know what will match and what will not. Dont know where to get part number from.

Car is A4 B6 2004 8E 1.8tIMG_20200615_141639.jpegIMG_20200615_141841.jpeg

The kit with the used keys and barrels is 4B0905851G part nr according to seller.

Confused

[BarnaBK]

This is eeprom readoutIMG_20200615_142326.jpeg

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[EuroxS4]

I am not sure if that remote will work. It may or may not. UK is a different market I know that for USA market Some B7 fobs did work with B6 a4's, However the part number was ending in a R and a S. I personally have 2 R b7 remotes that work. Again this is in the USA. Not sure if UK is different and may use a different frequency to transmit.

[BarnaBK]

I am not sure if that remote will work. It may or may not. UK is a different market I know that for USA market Some B7 fobs did work with B6 a4's, However the part number was ending in a R and a S. I personally have 2 R b7 remotes that work. Again this is in the USA. Not sure if UK is different and may use a different frequency to transmit.

Yeah, everything is the other way around here in UK.

Do you know wassup with these?

Most of the remotes I find for A4 is for up to the 2001 model, then A6 is all good to 2004-2005, even though they have ID48 chip and 433 mhz, they are not listed as compatible.

Are there any differences between ID48 chips?IMG_20200615_204122.jpeg

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[BarnaBK]

Like this one, looks exactly the same but they don't list it compatible.

Is it can-bus issue, or different immo?IMG_20200615_205128.jpegIMG_20200615_205141.jpeg

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[BarnaBK]

Some ot the answer might be here.

The chip has to be ID48 TP25 SILCA A2 and not T6 or anything else, thats why the chips above are not going to be compatible.

Now it depends if the ignition system is CAN-BUS (Audi "CAN") or not, that is why the B7 works on some but not on others, looks like the B7 is not CAN-BUS. (dealer key).

But all the remotes are 433mhz apparently. Could I buy any remote that is from around that year Audi like A3, A4, A6, use the remote and replace the chip and adapt?

Im just speculating.
Could anyone chime in?
IMG_20200615_210801.jpeg

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[EuroxS4]

Your best bet is to get the part number from the factory remote and order what you need or find out what part number work with your car. Some a6 remotes wont work and thing with b5 remotes. Some have 3 buttons some have 2. Big difference. You need to find out what is used in your market. I dotn have access to UK market only USA.

[BarnaBK]

Your best bet is to get the part number from the factory remote and order what you need or find out what part number work with your car. Some a6 remotes wont work and thing with b5 remotes. Some have 3 buttons some have 2. Big difference. You need to find out what is used in your market. I dotn have access to UK market only USA.

Is there a way to find out part number other than reading it off the remote? There is literally nothing on remote, I guess its an aftermarket remote bought by previous owner.

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[EuroxS4]

Not really. Either you can look it up by vin audi should have a parts website. Put in your vin and look for key or fob it should give you a part number that matches your vehicle.

[BarnaBK]

Your best bet is to get the part number from the factory remote and order what you need or find out what part number work with your car. Some a6 remotes wont work and thing with b5 remotes. Some have 3 buttons some have 2. Big difference. You need to find out what is used in your market. I dotn have access to UK market only USA.

And what about A3 remotes from same year? Did you heard anyone got it to work?

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[EuroxS4]

WE never had a3 in USA first year was either 2005 or 2006. I cannot confirm wether they had those working on not as USA market is different than European market. Some things are very different. I have seen a couple guys using b7 remotes I have one working with my b6 a4. However I used this part number. But not sure if this work for European market. 8E0 837 220 R I heard alot of guys also say that 8E0 837 220 L will work. But I also purchased the L and could not get it to work. So far for USA market 8E0 837 220 R works without issues.

Neither key will work on a 2002 model year in USA market. In order to work a different comfort module needs to be installed. 2002 model year is the only year affected.

- - - Updated - - -

https://blog.fcpeuro.com/how-to-upgr...7-audi-key-fob

[BarnaBK]

WE never had a3 in USA first year was either 2005 or 2006. I cannot confirm wether they had those working on not as USA market is different than European market. Some things are very different. I have seen a couple guys using b7 remotes I have one working with my b6 a4. However I used this part number. But not sure if this work for European market. 8E0 837 220 R I heard alot of guys also say that 8E0 837 220 L will work. But I also purchased the L and could not get it to work. So far for USA market 8E0 837 220 R works without issues.

Neither key will work on a 2002 model year in USA market. In order to work a different comfort module needs to be installed. 2002 model year is the only year affected.

- - - Updated - - -

https://blog.fcpeuro.com/how-to-upgr...7-audi-key-fob

Yeah thanks for that, Ill have a look.

Which year B6 you got?

I know what you mean its a different market, but still a lot of mods I did to my B6 was done following a write-up from here, from Americans. Like cruise control, DIS retrofit, LED than Xenon upgrades, Decat, and many more.

Is it actually that different? Its all German designed cars afterall.

Yeah, this was the link I followed when I broke the chip so dont even wanna see this the kid who wrote it never mentioned to be extra careful as chip could shatter..[EDIT] Just read it again, and he did mention be careful..

[EuroxS4]

I believe different frequencies may be used in Europe. Not sure on what they use but I have heard the badn may be different. I know Audi is currently using 3 or as much as 5 different frequency bands for key fobs/remote in europe.

[BarnaBK]

I can confirm 8E0 837 220 R does work in UK too, or at least on my car.

Thanks again @EuroxS4 and everyone who contributed.

Quote form Audi was £275 for one remote and programming,
DIY cost me £35 as I had the cable and VCDS lite registered.

[EuroxS4]

Glad you got it sorted out


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