1993 was first year of Zetec - I suspect it's a typo Ruut. No immobiliser on my '93. Dave's advice re: aerial close to the ignition key socket is good though. Don't know whether it is a passive or active key, if active, has the battery been replaced?
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly '11 MINI Countryman Cooper D All4 '90 LR 90 SW