Bartolete Keys Transponder Key Blank Fits 1998 1999 2000 2001 2002 Mercury Grand Marquis with Do It Yourself Programming Instructions

Bartolete Keys Transponder Key Blank Fits 1998 1999 2000 2001 2002 Mercury Grand Marquis with Do It Yourself Programming Instructions

This is about one uncut transponder key blank with a black plastic head, and the chip included inside the key and ready to be programmed. You can take it to most hardware stores, home improvement centers, or locksmith shops with your working key to cut it and duplicate it. If you have 2 original working keys, you can program this new key yourself. The programming procedure is very easy to follow step by step, and is included with the key. If you have only one working key, you can get it programmed at the dealer or professional locksmith. Any question you have, you can always contact us. We stand by our products, and they are guaranteed to work. It Fits 1998 1999 2000 2001 2002 Mercury Grand Marquis Even when you see in the photo the key design is different than the classic, and this key looks for newer car models than listed, the chip inside is the right one for these car models listed here, and is tested and ready to be programmed. The term transponder (short-for Transmitter-responder)means an automatic device that transmits a predetermined message in response to a predefined received signal. These car year, make and models have keys with transponders hidden inside the plastic head of the key. The owner of the car may not even be aware that the transponder is there because there are no buttons to press. When a key is inserted into the ignition lock cylinder and turned, the car's computer sends a radio signal to the transponder. Unless the transponder replies with a valid code, the computer will not allow the engine to be started. Transponder keys have no battery; they are energized by the radio signal itself. When you attempt to start the vehicle, the onboard computer sends out a signal that is picked up by the transponder in the key. The transponder then returns a unique signal to the vehicle's computer, giving it the ok for the vehicle to start and continue to run. This all happens in less than a second, and is completely transparent to the vehicle operator. It is a very effective system that does its job without the vehicle owner having to think about it, or modify his / her usual routine. This system was introduced to help reduce vehicle crime. If the transponder key is missing or faulty the car will not start.