Territory immobilizer problem

Sounds familiar! I have a Territory too. Had something similar happen a while back. Does the security light on the dash act strangely? Mine would flash erratically when I tried to start it. Almost like it couldn't decide if I was allowed to drive it or not. Like a bouncer who can't remember your face!

Thanks! Yes, the security light does flash erratically when I try to start it. Could you tell me how you fixed it?

Right, that's exactly what mine was doing. I couldn't fix it myself, unfortunately. It seems like the key and the car just… forgot they were friends. You'll probably have to take it to a workshop to get the key reprogrammed to the car's computer. Think of it as reintroducing them at a party!

Thanks for the confirmation and advice. I took it to a workshop, and the key was indeed incorrectly programmed, like you said. It's fixed now with a key reprogramming, costing 45€.