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Here's the story - Nissan X-Trail had a dead. A new battery was put in but the remotes don't work, replaced the batteries in them, nothing, so looked up about the process of reprogramming by turning the ignition on and off umpteen times etc etc. Nothing. I did read somewhere that if the immobiliser chip is 'switched off' then the reprogramming wont work. Car unlocks manually, starts etc and runs fine. Any ideas?

May need reprograming in with the Nissan machine the NATS system is a pain when it goes bad

This used to work on an Almera I had. Not sure if you have tried it already

1. Turn the ignition switch from Position 0 to ON 6 times within 10 seconds.
2. Then turn ignition switch to OFF position. Leave key in ignition switch.
3. After 2 seconds, the system will enter programming mode and will flash the warning
lights twice.
4. Press and HOLD the unlock button on the remote key.
5. While pressing the unlock button, press the lock button 3 times.
6. Release the unlock button.
7. The warning lights will flash once to indicate successful programming.
8. Repeat procedure 4 to 7 for up to 4 key’s.
9. When completed turn ignition ON, and the warning lights will flash 2 times.
10. Remove key, and check all remote key’s for operation.

Try uncoupling the battery and leave overnight ... recouple the battery
next day , it may reset the ecu and cure reset itself ... maybe good luck

Saintsman27 wrote:Try uncoupling the battery and leave overnight ... recouple the battery
next day , it may reset the ecu and cure reset itself ... maybe good luck

Thanks for that Saints - I'll give it a go. Nissan dealer said it would be £160 to reprogramme the keys