Standing in front of the trunk open it up. The key code should be on the right hinge (made of metal) of the trunk. In white Label background the code will be in Black 5 digits.
Ou812
Just a long shot, but check inside the trunk for a sticker.
Look on the trunk lid support arm.
Check inside the trunk, on the lid arm.
thats my question to you
To find the keyless entry code for a 2003 Mercury Grand Marquis, you can check the owner's manual, as the code is often listed there. Alternatively, look for a sticker on the driver's side door jamb or the trunk area, where the factory code may be printed. If you can't locate it, a dealership or a locksmith can retrieve the code using specialized equipment.
There should be a sticker on the underside of the trunk lid - that's where it was on my 92 grand marquis
You cannot reprogram it. A dealer can get you the Master Code if you've lost it.
Just inside the trunk lid it's a small piece of white tape w/ 5 numbers
To reset the keyless entry system on a 1997 Mercury Grand Marquis, start by disconnecting the vehicle's battery for about 10 minutes. Then, reconnect the battery and enter the vehicle. Press the "1" and "2" keys on the keypad simultaneously, which should reset the system. After this, you can program new codes if desired.
dealer has to do it with factory scan tool
You will find a sticker in the trunck with the factory code printed on it.