Golf mk3 gti ecu swap

[gareth_iowc]

hi all,

so my friend has a dead ecu we need to swap. He has bought a new ecu but it has no keys or immob box.

will the ecu work with the immob box current in the car or are they coded to each other?

thanks

[itavaltalainen]

They are coded to each other, however you can re-code it with VCDS, go to immo box (address 25) - adaptation - read channel 0 - then click save.
Switch off ignition and leave it be for about 5 minutes.

If you weren't so far away I'd read immo PIN for you as well and match it all.

[gareth_iowc]

Awesome thanks.

So it will work with out to immo pin?

What's the immo pin used for?

Many thanks

[itavaltalainen]

Matching keys (transponders) to the immo box only.