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Buying New Keys For The Mk4 Golf \ Bora


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#1 old_n07

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Posted 31 March 2009 - 04:49 AM


 

Getting spare keys working on the MK4 platform can be a bit of a nightmare at first glance so here are a few pointers:

Key overview:

There are four types of key on the MK4 platform all have an immobiliser transponder fitted to facilitate starting the vehicle.

 

1. Standard non-remote key

noneremote.jpg

 

2. Emergency key (plastic):

emergencykey.jpg

 

3. Two button remote early type:

round1.jpg

 

4. Two button remote late type:

sqr1.jpg

 

 

The two button types can be separated in two by grasping the key firmly in both hands and pulling the two halves apart, the top half with the buttons contains the remote control for locking and unlocking the car and the bottom half has the key blade and immobiliser chip inside.

Top

roundtop.jpg squaretop.jpg

 

step1.jpg step2.jpg step3.jpg

 

step4.jpg step5.jpg step6.jpg

 

Bottom

 

btm1.jpg

 

1.jpg2.jpg

 

 

DSCF0295.jpg   chip.png

 

The immobiliser chip is highlighted in red in the last picture, these are made of glass and are very fragile - they are glued into the original VW keys and are next to impossible to remove without breaking and once cracked they don't work.

 

Spare Keys \ Remotes

 

1. Remotes (top half of key)

If you want a new \ replacement remote fob then you need to make sure that the part number and frequency of the remote matches your current key fob. The replacement key fob can be a used item.

 

To check your current key frequency you need to separate the key in half then turn the top half over, on the back is the part number and frequency info

 

info.jpg

 

closeup.png

 

There are two frequencies make sure you get the correct one!

 

Update courtesy of Ray :)

 

 

Check the part number not the frequency only. 

HLO IJ0 959 753 A -  All vw's from 1997 - 2000.                   HLO 1J0 959 753 N  is usable and superceeds the older oval key used previously!

HLO 1J0 959 753 AG  - vw golf's only 2000-2004.                 HLO 1J0 959 753 CT now superceeds the older part number hlo 1jo 959 753 AG.

HLO 1J0 959 753 AH  -  vw passat's/bora's generally.             HLO IJ0 959 753 DA superceeds the older AH.

 

 

 

 2. Keys (bottom half of remote key or standard non-remote type key)

 

As the key bottom half contains the immobiliser chip there are a few things to look out for when buying a new \ replacement key, as keys that have been coded to an immobiliser 3 vehicle can't be recoded to a new vehicle as the chip is write once.

 

Ideally buy a completely new key that has not been coded to another car before.

 

If your car is immo2 based:

 

You can buy a second hand key but you will need a new key blade to be cut, however the key can't have come from an immo3 vehicle as it can't be recoded

 

If you car is immo3 based:

 

The immobiliser can't be second hand (used), you will need a key bottom with a virgin transponder fitted to enable it to be coded to your car. So that means either

  1. A brand new key bottom half or

  2. A Second hand one with a new blade and then you will need to get a new transponder sepperately, Hickleys sell the transponder (AKTP2).

Beware on eBay when looking at keys, the add may say new key blade fitted, this however does not mean that the transponder chip is new and uncoded so you might end up with a key that unlocks the car but can't be coded to start it afterwards - If in doubt explicitly ask the seller if the key has been coded to a vehicle or not and does it contain a virgin transponder.

 

 

th_parts1.png  th_parts2.png

 

 

If you need a new key blade for a key there is a seller on Ebay that supplies new blanks cut from a digital photo :Y:

 

Once you have your new key it will need coding to your car, you will need the SKC (secret key code) to match the immobiliser chip to the car but you don't need the SKC to match the remote part for locking and unlocking the vehicle, some older cars had the SKC provided on the key tags that came with a new car. If yours didn't then it can be retrieved with some third party tools such as Vagtacho.

 

VCDS (VagCom) can't retrieve the SKC code

 

Hope that helps

Neil


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#2 Keyser-Soze

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Posted 31 March 2009 - 05:25 AM

First class Neil, all the info in one place & clearly laid out![Y]


Had to do this recently for my mate who only had 1 key for his passat.


Koni STRT 40mm | 18" RS6 | TT Wishbones, Hubs & 312mm Brakes | PP520 Injectors | Remap 135Bhp | Allard EGR Delete | VR6 G60 Conversion | MFD Ver G TMC & XCarlink | FIS Bora Sport - MTE & Needles | Power Fold Mirrors | Retrofit Full Convenience System | Cruise Control | GTTDI Heated Black Leather | R32 Interior Trim | R Line Gear Knob | Door Button Delete | De-locked | Twin Alarm LED Mod | FK Angel Eyes (CCFL) & 6K HID | Headlight Washers | Euro Spec Lights | F&R Aero Wipers. 


#3 VR6Rich

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Posted 31 March 2009 - 06:48 AM

Good guide Neil, one question though, I thought you could code a key using VCDS and don't need the SKC code?



#4 old_n07

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Posted 31 March 2009 - 07:14 AM

I thought you could code a key using VCDS and don't need the SKC code?

If you are coding the remote then you don't need the SKC but if you are doing the immobiliser chip then you need to log into the cluster first then adaption chanel 21 and code the keys.

Neil



#5 BlackMagic20vt

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Posted 31 March 2009 - 07:21 AM

 Great post Neil will hopefully answer alot of questions before people ask the same over and over again....



#6 VR6Rich

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Posted 31 March 2009 - 07:26 AM

I thought you could code a key using VCDS and don't need the SKC code?

If you are coding the remote then you don't need the SKC but if you are doing the immobiliser chip then you need to log into the cluster first then adaption chanel 21 and code the keys.

Neil

So in summary, if I get a new key and swap the blade section across I can just use VCDS to program the remote and thats it, but if I want to use the new key section, apart from getting the key cut, i'll need the SKC and VagTacho?



#7 old_n07

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Posted 31 March 2009 - 07:35 AM

I thought you could code a key using VCDS and don't need the SKC code?

If you are coding the remote then you don't need the SKC but if you are doing the immobiliser chip then you need to log into the cluster first then adaption chanel 21 and code the keys.

Neil

So in summary, if I get a new key and swap the blade section across I can just use VCDS to program the remote and thats it, but if I want to use the new key section, apart from getting the key cut, i'll need the SKC and VagTacho?

Yes, if you want to just use the remote then you just need to pair it to the car, either by Vagcam (VCDS) or the key in the door method. But if you want to use the lower half with the immobiliser you will need the key cut and the SKC code to pair it to the car.

Neil



#8 old_n07

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Posted 31 March 2009 - 07:40 AM

 Great post Neil will hopefully answer alot of questions before people ask the same over and over again....

Hopefully it will save some of the repetative questions Tam [y]

Neil



#9 Neutron

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Posted 31 March 2009 - 08:28 AM

Thank you for this - you just saved me £20 or more - I have been looking at getting a second-hand key for my immo3 and thought I'd covered everything. One bit that escaped my attention was the need for a fresh transponder !



#10 gizmo68

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Posted 31 March 2009 - 11:05 AM

Thank you for this - you just saved me £20 or more - I have been looking at getting a second-hand key for my immo3 and thought I'd covered everything. One bit that escaped my attention was the need for a fresh transponder !

The transponders are pretty easy to get from Hickleys 

the MKIV (non CAN based) uses the AKTP2 transponder (£7.47 inc VAT & P+P) and

the MKV (CAN based) uses the TP23 transponder (£21.27 inc VAT & P&P)

 

BTW great write up Neil [Y]



#11 sidhee73

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Posted 31 March 2009 - 11:26 AM

Fantastic write up - the questions get asked countless times, so hopefully this one will be a sticky [Y]


Top man Neil !!!



#12 Neutron

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Posted 31 March 2009 - 12:18 PM

Cheers Gizmo - a useful bit of info, I did a quick Google to try and find out if they were available seperately but unless you know what you're looking for it's a bit tricky.



#13 Mikemk4

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Posted 31 March 2009 - 12:32 PM

Yeh nice one mate . . . good of ya to take the time to put it all on [Y]



#14 kalu

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Posted 31 March 2009 - 02:59 PM

Great Post Neil, will save me some PM's Yes



#15 Keyser-Soze

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Posted 21 May 2009 - 06:16 AM

Who are the members that can get hold of new keys with virgin transponders?


I would like an upgrade to the newer button square version if anyone can help please. 


Current key part no: HLO 1J0 959 753A 433mhz. 


Koni STRT 40mm | 18" RS6 | TT Wishbones, Hubs & 312mm Brakes | PP520 Injectors | Remap 135Bhp | Allard EGR Delete | VR6 G60 Conversion | MFD Ver G TMC & XCarlink | FIS Bora Sport - MTE & Needles | Power Fold Mirrors | Retrofit Full Convenience System | Cruise Control | GTTDI Heated Black Leather | R32 Interior Trim | R Line Gear Knob | Door Button Delete | De-locked | Twin Alarm LED Mod | FK Angel Eyes (CCFL) & 6K HID | Headlight Washers | Euro Spec Lights | F&R Aero Wipers. 


#16 davehughes

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Posted 21 May 2009 - 06:28 AM

 Interesting, I only have one key and this is on my list of jobs. Good post![:D]



#17 Keyser-Soze

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Posted 04 June 2009 - 06:42 AM

Can someone confirm if this key is suitable?


After doing an OEM electric window install I only have one key now and have got another one off the bay.


I have a key part no. HLO 1J0 959 753 AH 434MHz (Square 2 button).


Key from ebay I have been told by the seller is a replacement for other model nos. HLO 1J0 959 753 CT 434MHz (Square 2 button).


I know about the immo chip & all that, just need to know if the remote section will work as the seller says.


Koni STRT 40mm | 18" RS6 | TT Wishbones, Hubs & 312mm Brakes | PP520 Injectors | Remap 135Bhp | Allard EGR Delete | VR6 G60 Conversion | MFD Ver G TMC & XCarlink | FIS Bora Sport - MTE & Needles | Power Fold Mirrors | Retrofit Full Convenience System | Cruise Control | GTTDI Heated Black Leather | R32 Interior Trim | R Line Gear Knob | Door Button Delete | De-locked | Twin Alarm LED Mod | FK Angel Eyes (CCFL) & 6K HID | Headlight Washers | Euro Spec Lights | F&R Aero Wipers. 


#18 ABM

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Posted 04 June 2009 - 07:33 PM

 Noticed this evening that my only key is breaking - the pin that holds the blade on fell out because the metal is cracked. Tried to open the key to get the codes off it, and it's absolutely stuck solid (I think I can see traces of glue [:(])


Is there another way to get the codes, or am I going to have to go and pay VW's extortionate prices for a new one?



#19

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Posted 23 June 2009 - 03:02 PM

Similar problem here ABM , mine is that i dont have a remote key fob to start with , only the spares so where do i start trying to figure out which part number? On other cars ive had the alarm ecu etc have helped me figure it out but i dont even know where it is on this car!


Any tips?


 



#20 naut2k5

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Posted 27 August 2009 - 03:16 PM

n00b question but how do you tell if your car is immo 2 or immo 3 based?


Great write up!



#21 gizmo68

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Posted 27 August 2009 - 03:34 PM

Ross-Tech Immobilizer information


Basically 2000 - 2001 is immo2


2001 - 2004 is immo3


The MK5 is immo4



#22 old_n07

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Posted 27 August 2009 - 04:22 PM

Ross-Tech Immobilizer information

Basically 2000 - 2003 is immo2

2003 - 2004 is immo3

The MK5 is immo4

Immo3 came in arround March 2001, all MK4's before this were Immo2 it is hit and miss arround the change over date to what you will have but if you read the cluster FAQ it tells you the difference and how to find which you have [y]

Neil



#23 gizmo68

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Posted 27 August 2009 - 04:36 PM

Immo3 came in arround March 2001, all MK4's before this were Immo2 it is hit and miss arround the change over date to what you will have but if you read the cluster FAQ it tells you the difference and how to find which you have Yes

Neil

Not quite sure why i put 2003 as i just copied (badly from the looks of it lol) from the Ross-Tech site as per the link.



#24 naut2k5

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Posted 27 August 2009 - 05:48 PM

This car is 2002, so I gues!  Don't really wanna take out my cluster to find that out and don't have vag-com.  Will check the dash tomo for that little special symbol and get back [;)]


All this to see if I need a transponder or not ... got my key from ebay yesterday but didn't check if the transponder is a "virgin" or not.  The key does need cutting though - infact can I just get this cut at a normal key cutting place, or does it need to be done at acar place?


Thx for your help guys, much appreciated! [Y]



#25 old_n07

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Posted 28 August 2009 - 02:19 AM

 That will be deffinitely immo3, you can check if the transponder has been coded before using VCDS (Vagcom), take a look at the key coding guides in the DIY section index [y]


As for blade cutting, Timpsons can do it


Neil



#26 KJE

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Posted 28 August 2009 - 04:30 AM

cracking post, thanks



#27 cenobytez

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Posted 28 August 2009 - 04:36 AM

awesome post Neil !!


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#28 naut2k5

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Posted 28 August 2009 - 05:31 AM

Ah Timpsons is near me in Bluewater Shopping Centre ! Woo [:D]


Any one with VagCom near Dartford or Kent / South London - I don't mind travelling [au]



#29 old_n07

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Posted 28 August 2009 - 05:37 AM

 PM R44MS_K he can do the coding and is based East London way [y]



#30 naut2k5

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Posted 28 August 2009 - 05:40 AM

I think I will need the VAG Tacho to get the SKC code if I am understanding this correctly ..

Again, anyone in the Kent/London area with this: http://www.vagproduc...ct/vagtacho.htm [I]







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