Alarm issue? Dead X5 - help

[upallnight]

Originally Posted by andrewwynn

Battery charges when in the ignition. You can have the car on a charger I don't remember if the car has to be in on position.

Double locked door should resolve with a couple lock/unlock cycles from outside with the key. If not use the emergency exit method: lock with the (working) fob when inside the car, press twice to disable the motion alarm then hold the central lock button down and pull the door handle to disable the double lock. You should feel resistance. You can pull a second time to release the door.

(just be aware the alarm will sound and get ready to put the key in to disable)

When the key is in the ignition the body module and ECU/PCM is aware that the key is in the ignition. Open the door with the key still in the ignition and the buzzer will sound to remind you that you left the key in the ignition. Also leaving the key in the ignition mean the car will never go into sleep mode so the current drain is a lot more compare when the car is in sleep mode.

[Crowz]

Originally Posted by trhaverstock

Slick charger. I drove around with the "bad" FOB in there for ~15 mins and it's not charging up. Dead or need more time? Should I spring for the charger and try to bring it back to life that way?

I would. Its only $10 and you can top off a key anytime you want to. If I had of known about the thing before buying it to charge my watch I would of bought one to keep the keys topped off as several of my bmw's sit a bunch.

The cars steering column charging is VERY weak in comparison. This charges much faster. But on the plus side it hasn't fried any keys charging with it so far. I had read some people had killed their keys with the toothbrush chargers which I think are much stronger than this charger.

Again so far after 20 plus key chargings for people its worked flawless for them.

[Overboost]

Originally Posted by upallnight

Also leaving the key in the ignition mean the car will never go into sleep mode so the current drain is a lot more compare when the car is in sleep mode.

Not sure if I agree with that. My X always has the key in the ignition in the garage, I never take it out unless I am out and around town outside of the garage. No drain what so ever in the garage and always goes into sleep mode.

[andrewwynn]

Good feedback. I would suspect that until sleep the key would be powered so you could get 16 of charge each time you opened and closed the door. Sleep would prevent the car's battery from draining


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[cn90]

- My E39 1998 528i just did this (alarm going off for no reasons etc.). Cra didn't start.

- Turned out a new battery (Exide L5 $115) solved the problem!

[trhaverstock]

Crowz, ordered the key charger Sunday via that link; it'll be here Tues and I can see if it brings that FOB back. Thanks for the tip on this.

[Crowz]

Originally Posted by trhaverstock

Crowz, ordered the key charger Sunday via that link; it'll be here Tues and I can see if it brings that FOB back. Thanks for the tip on this.

Your welcome.

[jdstrickland]

Originally Posted by Crowz

Here is the charger I was talking about. I borrowed the wifes key to demonstrate

That's the same charger that I use for my Samsung Gear S3 watch. Well, it looks the same. Whether it is the same or not is a good question.

[bimmertech20]

If your e53 alarm is still going crazy check fuses 1-5 in glove compartment. Had an X5 do this a few weeks ago. Thinks it’s fuse 4 that supplies one of the 12v sources to alarm module/DWA system. Had a completely dead battery and drivers door lock cyl was grenaded. Replaced 10A? fuse, Took lock cyl out, centered the lock switch, threw a good battery in, initialized key, and good to go.

Note: another symptom of that blown fuse is no power to OBD2 port for scan tool equipment.