Problem with immobiliser for VW passat

TheAceFace

I got a new key fob off ebay recently cause the old one was cracked.
I put the chip for locking/unlocking the car into the new key fob and I also put the old key blade into the key fob as well.

Now when I try to start the car it doesn't recognise the key. The light on the dash for the electronic immobiliser then starts flashing.

Does anyone know what I can do to fix this?

If someone from VW has to call out to reprogram the key/computer how much will it cost?

Thanks

$Leon$

you need to get the fob coded to the car.
needs to be done by main VW dealer.
should cost 1 hours labour

crosstownk

TheAceFace wrote:

I got a new key fob off ebay recently cause the old one was cracked.
I put the chip for locking/unlocking the car into the new key fob and I also put the old key blade into the key fob as well.

Now when I try to start the car it doesn't recognise the key. The light on the dash for the electronic immobiliser then starts flashing.

Does anyone know what I can do to fix this?

If someone from VW has to call out to reprogram the key/computer how much will it cost?

Thanks

You say you replaced the "chip" - was this an electronic pcb or simply a small metal rectangle. What year is your Passat. Does the key blade have "W3" engraved on the blade? Did the blade you bought with new fob have "W3" engraved? Does the fob have remote central locking - if so does this still work?

Mercury_Tilt

This post has been deleted.

crosstownk

Mercury_Tilt wrote:

This post has been deleted.

This is correct. But VW changed the transponder in 1999/2000. The new transponders are reprogrammable - they change the transponder ID every time the car is successfully started - they are not interchangeable AFAIK.