Can you lock a '91 740 volvo without the key?

Steering will be locked ,best you go visit a lock smith.

Take the door lock off and take the lock to a lock smith and let him cut the key, I am sure it wont be a meganatic key.

try puffing some graphite powder in the key slot to lubricate the lock pins as they may be seized up or binding up in their holes.

Chrysler sebring 2008 drivers door wont open all central locking including drivers door working and all doors working except druvers door remains shut any advice

check central locking system fuse it controls all door locks and other acessories.need go to dealership buy remote keys..

anti theft device

You should be able to disable the alarm by putting the key in the door and turning it, or by putting it in the igintion switch and turning it. One of the two should disarm the alarm. If that will not work, then you could disconnect the battery, call the dealer and get a key fob for the alarm system.

You can check 2 things. 1., have someone in the car to turn the key to the start position. Tap the starter with a small hammer and see if it cranks. If it does, replace the starter. 2., have the battery tested as well as the connections to the battery. Corrosion builds and can cause heavy resistance to heavy loads(like starting). These are the 2 most likely causes. Let me know if you need further assistance.

Go to the dealer and get a new lock set installed. And remotes programed (not cheap).
Sorry to hear that.

Or you can just go to the dealer and get some keys made. Then sell it and get a 1998 its the same thing but made much better,

Make sure to change the home locks too because if they stole her wallet they have her address and her keys so they will come back and rob your home. This had happened to people i know.