If the car has an immobiliser then the ECU will be locked to the appropriate >key. If you can get the key from the other car you can remove the pickup >coil from the ignition barrel on your car and tape the key from the new ECU >to it and stick it up under the dash. Your normal key will then start the >car, but you will not have an immobiliser.>

to it and stick it up under the dash. Your normal key will then start the> car, but you will not have an immobiliser.>

JOhn>

"Mark" <here@invalidaddres­s.com> wrote in message> news:3cslmqF6qrjt1U­1@individual.net...>­ > Are ECU's on a Nexia interchangeable between cars? I picked one up at> > my local breakers from a low mileage Nexia which was similar year and> > engine as mine and the SERV. No. printed on the ecu was the same number.> > Swapped it over but turning the key spins the engine without> > firing. These car's are fitted with an immobiliser system so I was> > wondering if the ecu is programmed to that vehicle only?> >

I've never seen a Daewoo key, but a neater solution might be to take> the keys apart and swap over the transponder. It's normally in a black> plastic package a bit smaller than a tic-tac.>

Cheers,>

Colin.

This very same problem was mentioned in car mechanics magazine a month or > two ago, the new ECU needs to be programmed with the VIN number of the car > it came from or something similar! And also into the Immobiliser and the > two numbers have to match.

I think basically you need the chassis number of the car the ECU came from > to do this properly.

Andy

That can be done with some keys alright, but just going from memory I think >the transponder in the Daewoo is moulded into the key.>

Thanks for the replies. I opened up the ecu to have a nosey inside and> noticed a large chip contained in a blue plastic housing that allows you> to pull the chip out of the main board. I'm not sure what info this> chip contains or whether it's anything to do with the immobiliser?>