rear doors and tailgate wont unlock

[freedo]

Having a odd door lock issue with my 05. I have it programmed to unlock all doors with one key press. But randomly it only unlocks just the front doors and the rear hatch. Rear doors and rear tailgate stay locked. Rear doors will not manually unlock from the inside either. Unlock with key in door no difference along with the unlock button behind the shifter. Its not every time but its pretty frequent and extremely annoying. I did not have the X5 for very long before I had the locks programmed this way so I cant be sure the programming caused this. It also happens when locking that sometimes the rear doors wont lock with the fronts and if you open them the alarm goes off. Any thoughts on where I should look? Also shouldnt the interior door handles unlock the doors no matter what? Seems unsafe that there no mechanical override in the event of a accident. everything else on the rear doors and trunk work. wiper, washer, windows, soft close, lights etc. just the unlock has completely failed on the rear doors and tailgate

[andrewwynn]

The one door unlock is key dependent did you have all keys programmed for this method? I program my keys to open all doors and wife's to do the one/all. I'm assuming you're using the same key and it does the unlock wrong some times.

I had a similar bug with my e53 where it would behave like I used a different key to unlock and it would auto adjust the seat to some other position and it would happen fairly regularly like monthly and somehow I guessed into this fix you can try;

When it doesn't do what you expect doing this kicked it back into proper function:

Get in the car put in the key to roll Sieb the window, in my case I had to press the memory one button to reset the seat and steering and then reach out the window and with the key lock and unlock the door. That would reset the system and it would not move the seat on unlock for a month or three until the next time. Until I figured out this hack it would reset my seat/steering/mirrors every unlock until I did the hack.

Good luck hope it works.

[Effduration]

I think I would use PA Soft (aka BMW Scanner 1.4) to reset the door locks back to the factory 2-press unlock system....Then re-select one press unlock for each key per instructions below...

https://xoutpost.com/bmw-sav-forums/...all-doors.html

If that fails to work, I would try a new used LCM module...which are cheap used , but need to be coded to the car I believe.

[freedo]

Originally Posted by andrewwynn

The one door unlock is key dependent did you have all keys programmed for this method? I program my keys to open all doors and wife's to do the one/all. I'm assuming you're using the same key and it does the unlock wrong some times.

I had a similar bug with my e53 where it would behave like I used a different key to unlock and it would auto adjust the seat to some other position and it would happen fairly regularly like monthly and somehow I guessed into this fix you can try;

When it doesn't do what you expect doing this kicked it back into proper function:

Get in the car put in the key to roll Sieb the window, in my case I had to press the memory one button to reset the seat and steering and then reach out the window and with the key lock and unlock the door. That would reset the system and it would not move the seat on unlock for a month or three until the next time. Until I figured out this hack it would reset my seat/steering/mirrors every unlock until I did the hack.

Good luck hope it works.

i currently only have 1 key. it has now gotten to the point where for the past 2 days the rear doors and tailgate havent unlocked once (atleast 30 attempts throughout the day) seat, mirrors and steering wheel havent changed positions

[Factory6speed]

What exactly did you program and how? I would probably consider undoing that and start over. Was a battery maintainer used? If you flashed a module on a lower voltage you might get some interesting results

.There's a child lock switch on the inside but I think that just prevents the inner door handle from working, not sure if it messes with the lock mechanism at all.

I've encountered some strange behavior with the lock mechanism on mine a couple times but haven't picked that battle yet. Just keeping it unlocked for now. I have to code out the beeping first, if anyone knows how to do that. I also have a parasitic draw .. and the left rear exterior door handle failed yesterday but I smacked it back into place enough for now. These are easy fixes right.

[freedo]

Originally Posted by Factory6speed

What exactly did you program and how? I would probably consider undoing that and start over. Was a battery maintainer used? If you flashed a module on a lower voltage you might get some interesting results

.There's a child lock switch on the inside but I think that just prevents the inner door handle from working, not sure if it messes with the lock mechanism at all.

I've encountered some strange behavior with the lock mechanism on mine a couple times but haven't picked that battle yet. Just keeping it unlocked for now. I have to code out the beeping first, if anyone knows how to do that. I also have a parasitic draw .. and the left rear exterior door handle failed yesterday but I smacked it back into place enough for now. These are easy fixes right.

i had a local BMW shop do it for me. they did one press all unlock/lock. turned off auto lock when driving and turned on windows up when holding lock feature. everything else has been perfect. it took about a week for the failing door lock to occur/be noticed but it work more times then it failed. been about a month now and it is actually never unlocking the rear doors

[andrewwynn]

When my central lock got confused the confused state stayed until I did the lock/unlock through the door trick. It didn't help to unlock/lock/unlock while outside. I didn't have my car programmed for all unlock I only noticed it was using the wrong key program for the mirrors and seat.

I had to put the key in to roll down the window but I didn't start the car then I pulled the key out and reached though the window and lock/unlock with the key blade. It worked every time it happened and then I got a month or few of reprieve until it happened again.

[andrewwynn]

Originally Posted by freedo

i currently only have 1 key. it has now gotten to the point where for the past 2 days the rear doors and tailgate havent unlocked once (atleast 30 attempts throughout the day) seat, mirrors and steering wheel havent changed positions

Get a factory key there are links to the online legit BMW dealer that will save you like $50. That's where I got mine when I lost my spare key and my remaining key lost remote function. It was worth every penny.

[Clavurion]

Coding for selective locking alters if only the driver door or all are opened with first unlock. So coding wouldn't explain the difference with both front doors opposed to rears. Front door locking is operated by individual door modules (P-bus message from body module) and rear doors by body module directly. So this sounds like a body module problem.

[andrewwynn]

Solid deduction. This is where you take your bidirectional scanner and command doors to lock/unlock directly and figure out what works and doesn't.

Are you coincidentally just having lots of DLA failure

A clue is you said you opened a door and set of the alarm.

Are all the doors actually locking and unlocking on command? It feels more like some of the locks are taking more than one press to unlock.