I believe it should be attached to the lug wrench that is stored in behind the
removable plastic panel in the cargo area on the drivers side
behind the jack compartment. twards the back passenger door
go to the dealer with the vin number and they can make the key about $150
5
The Ford P.A.T.S. (Passive Anti-Theft System) on a 1999 5.0L 2WD 4-door Mercury Mountaineer disables the engine's ability to start if the correct key with the embedded transponder is not used. If a non-authorized key is detected, the system prevents the fuel injectors from activating, effectively immobilizing the vehicle. This security feature helps deter theft by ensuring that only keys programmed to the vehicle can start the engine.
You can find the five digit numbers for the keypad on a 2006 Mercury Mountaineer in the owners manual. You can also call the dealership and ask for a the code or take the vehicle in for a new code to be programmed.
This is up to the dealer doing the job, count on $100 US
No - the starting system is totally separated from the remote entry.
Turn the key to the right.
put the key in the door and turn it to unlock
Click on the link below Click on Owner Guides The owners manual ( which includes the instructions ) can be viewed online
To reset the anti-theft system on a Mercury Mountaineer, first, unlock the vehicle using the key or remote. Next, insert the key into the ignition and turn it to the "On" position without starting the engine. Leave it in this position for about 10 minutes until the security light turns off, then turn the key back to the "Off" position and try starting the vehicle. If the problem persists, consulting the owner's manual or a professional mechanic may be necessary.
In 1999 it may or may not have one. If it has a thick black head with the hole in the head of the key being offset, then it is probably a chip key. If the hole is in the center top of the key or completely metal then it is not a chip key.