If you set the alarm closing the door and locking from the drivers door, then wait 60 seconds so that the alarm is active. Now try this, turn the key to unlock once, then twice, this should unlock the passengers door. If not then the issue is with the left door lock. There is a contact switch in the door lock that has failed and is causing your issues. This is a known problem with the door locks, and there is no way to by pass it. the reason it does not do anything with the remote is that when the remote is set or unlocked the confort control unit knows that the doors are about to open. You may need to replace the door lock. The other thing that you can do is purchase a remote on ebay, make sure the part number is XXXXX You can code the remote at home if you have two keys, one has to be on the ignition with the key turned to the on position, then both doors closed, you unlock and hold the key outside, as soon as you hear a beep, you can then push a button on the remote to code it to the vehicle.David39472.9376690972