Only asking....
Why would the immobiliser ring be different between the Plus 4 and the 4/4 of the same manufacturing years.
I can guess that the ECU might be different but I would have thought the steering column electrics and instrument electronics would probably be the same.
I'm asking so the immobiliser ring does not get ruled out of this diagnosis IF indeed it could happen.
Is it DEFINITE that the problem only occurs on the Plus 4 ??
