I have an issue with my 1999 magna advance when locking with key. the response is to unlock immediately. Is this a simple fix

so is a Mitsubishi car????/
bonnet = UK
all ways top exit ways are dead. fob, door card buttons, and locks and levers in the car???????
all seated pos, in the car? are dead,.?

so you want to roll the window down to use key to exit car with (lurch) long arm act?
most door locks use a CB not a fuse. a device called Circuit breaker.
why not just fix the problem?
oops no MAGNAs here USA on service manuals to tell you how to fix any UK car.
sorry

not told do all doors fail.
and how ,all doors working or not , is best told to make the job easier to fix.
KNOWING that.

that door key thing confuses me, the windows are dead too?

There is a door lock fuse in the bcm. Pulling the fuse isn't the proper fix. At the least, you would have to manually lock and unlock your doors. There are safety issues with door locks. Be safe. Safety is your responsibility.
The bcm shows to be under the dash toward the front of center console on passenger side. I'm not sure if replacing bcm would fix? The bcm is not simple remove/replace component, there is reprograming.

It would help if we knew what car you have we don't read minds aswell

go to police or lock smith and either can unlock door but you still need to fix door lock maybe locksmith can fix.or dealer.

not familiar with your car but one car I had
your had to press unlock, once for drivers door, twice to unlock all the doors.
and one of my bosses old cars, short press, drivers, long press all doors.

I swear, there is no end to security system issues. Causes far more problems for owners than thieves it's supposed to protect from. Oh, for the good old days...
You'll have to have it diagnosed by a knowledgeable tech. Likely a simple fix, but the key word is (somebody who knows the system).
I hope you get a better response here. good luck.

check fuse

I believe this was done as a safety feature. It stops a potential car hyjacker from sneaking in the passenger door when you open the driver door. I know recent Hyundai models are set up such that if you turn the key in the driver's door once it only unlocks the driver's door. If you turn it twice in quick succession it unlocks all of the doors. Maybe the Camry is set up the same way.

depending on how the car is set, the unlock may have to be depressed twice to unlock the passenger door. i'm guessing you have already tried this? if not give it a shot.

if that didn't fix it, then sit in the car and hit the unlock button twice and see if you hear the passenger door unlock/lock mechanism trying to unlock the door. if you can hear it trying to pop the lock, then it may be an issue with the cold. my '99 323 was this way in the cold. if you can't hear it trying to pop the lock, then the module in that door is bad.

also when was the last time BMW replaced the battery in that key?

good luck.

u have go with a good technision of car repariring