first of all, make a duplicate key of this. ask the key wala to insert the simple duplicate key in the ignition and try starting the car - the car will crank but will never start and the check engine/security light will 'blink' - means the immobilizer is active and without proprt coding of this key the car will never start. now as a second step, the key wala will program this duplicate key as per your car and then this key will be able to start the car. in karachi, a duplicate key can be made easily for 2000-2500 rupees.