As I have had a fair few PMs on this issue and seen a little traffic on the forum I though I'd make up a little guide on what is a fairly old concern. The symptoms would be a non start, possibly intermittent and the immobilizer light flashing on the dash. This can be for many reasons but this is quite a good cheap first port of call. The immobilizer system has a few components and it's quite simple in operation. The components are as follows Immobilizer control unit (integral part of the dash