Immobiliser need to disarm immobiliser to start car

Sorry but you don't - without the regular correctly coded key the immobiliser won't disarm.

The immobiliser is integrated into the computerised management system and can't be bypassed. You need to contact a very good auto locksmith or the dealer.

Factory alarm (if not an optional extra) is probably, like the immobiliser, integrated into the engine management system. If this is so it cannot be disarmed without a correctly coded signal from the key or fob.
That would leave you with two choices - either obtain a new fob and have the system recoded or to have the system decoded, effectively disabling the alarm and immobiliser. Costwise there isn't much difference...

Immobiliser is disarmed when the antenna around or near the steering lock receives the code held in the transponder chip within the key and then if that code matches the code in the black box memory it will send a signal to disarm the immobiliser.

It cannot be bypassed or otherwise disengaged except by a key with the correct code.

disconnect the battery both leads then join them together and leave for half hour or one coffee in the local bar and a ciggy then reconnect and it should start ,this mazda uses the same software as a ford mondeo and a jaguar S type of the same year and it works on them

No. That the whole purpose of it , so that no one can steal it without having the proper key or code to disarm it .

The immobiliser can be disarmed by entering the 4 digit code in the owners handbook, but unfortunately the immobiliser can only be programmed when connected up to diagnostic equipment.

Is the key fob battery flat? If so fit new CR2032 and re-sync to car by pressing lock 4 times in succession

If, when you switch the ignition on, you get a dash light on, the symbol is a car with a key overlaid, you have somehow activated the immobilser You could try disconnecting and reconnecting the battery, this may reset the immobiliser, If this does not work you will have to contact a Hyundai dealer to get the immobiliser unlock code.

try locking and unlocking the doors with the key....both frot doors are equipped with disarm switches...if that dont do it then you will need to find a reputable garage or dealer to help you

Hi
Had a similar problem with my x type 2.5 petrol, only had the car 1 day went to start it nothing happend all the lights came up on the dash but the engine wouldn't start and the immobiliser light stayed on. Spoke to Jaguar they had no idea and I couldn't get it to them. After disconnecting the battery trying to reset the immobiliser phoned and auto locksmith they came out and discovered the end of the key with the blade had lost it's coding and the immobiliser was not disarming, they reprogrammed the key and the car started no problem. As far as i know there is no way past the immobiliser. Hope this helps.