[hyunminyo]

everything else works except door unlock, lock feature.

my car had no problems at all, but couple days ago i got a warning message on the display that the key fob battery is low, so i replaced the key fob battery. then now i cant lock/unlock my car by touching the door handle. both the drivers and passengers door handles are not working. i did not test my old battery because at the time i already threw the old battery out and i dont think replacing the battery on the keyfob would cause the door handle to not respond. i still can lock/unlock the car with key fob buttons, and start the engine without inserting my key in the slot.
i lock my car and put the key fob in the trunk and try to close it, the trunk wont close the since comfort access system still can detect my key fob in the trunk. I tried checking fuse box but all of them are working fine. i checked my car's battery and it is still good, i think, battery load test gave me 13 or 14, i cant remember the exact number. my door handles are not warm. i tried holding key fob in the slot for 10 seconds method but not successful. I tried searching the forum but none of them seemed to fit/solve my case. well, taking it to the dealer would be my last resort since my car's warranty is expired. but im out of ideas and any help is appreciated,

p.s.: how much would it cost to replace both drivers and passengers door handle with comfort access?

[PSEE]

are you wearing gloves?

have you tried wetting your finger tip before touching the door handle?

seriously.

there has to be a good conductive connection between you and the door
handle. washing the car and getting the stream of water from the hose on
the door handle (with the CA key in your pocket) will cause the doors to lock/
unlock each time the water touches the door handle.

...food for thought...

[hyunminyo]

it worked fine with my bare hands before, and i tried wetting my hands but no success.

[WilliamS]

Place the key in the ignition and start the car, let it run I think it was in the minute to two range. Remove key, get the hell out, and try CA entry again.

[hyunminyo]

just tried it and did not fix the problem.
i guess i would just have to go to the dealer and have them check out

[Delusive]

That would be awkward having to wet your hands first just to get CA to work

You: Takes bottle of water out or spits on fingers
Friend: What are you doing?
You: Just watch!
You: Door unlocks, tada!

But you know you didn't have to replace the battery in your key fob? if you insert it into the slot while driving it charges the battery up, well that's what I heard about mines but I don't know about CA Key Fobs. Replacing the door handles would probably range from $80-200 each.

[WilliamS]

The CA fobs do not have passive charging.

[JRJ1970]

LOL on the wetting hands. I wouldn't doubt it if that helps. Every time I wash my car, it locks and unlocks itself when any spray jets hit either door handle. It's totally crazy how it's water sensitive.

I think BMW's design could be better here. The CA access points should be actual buttons rather than touch sensors.

[Spydeputy]

Just went thru the same thing, they had to reload the software of the car. That fixed it.

[hyunminyo]

yes i knew ca key fobs do not charge.. and yes my car also tried to lock/unlock whenever i sprayed water too. but now it doesnt and it makes me sad.. any more idea to test or fix this?

[Spydeputy]

Just went thru the same thing, they had to reload the software of the car. That fixed it.

Originally Posted by chicagogogo

yes i knew ca key fobs do not charge.. and yes my car also tried to lock/unlock whenever i sprayed water too. but now it doesnt and it makes me sad.. any more idea to test or fix this?

[krayzie089]

Mine was doing the same thing, so i took it in for service. Apparently my car battery was the culprit and i got a new one. No more issues now. When your battery gets low, comfort features like heated steering wheel, seats, doors ect. are cut back in order to save power for start up.

[PSEE]

a bit off topic...

anyone know where to find a good deal on the rechargeable key fob?

my wife's '06 wagon's key fobs no longer recharge.

thanks!

[notanotherbmw]

Anything that goes wrong with a BMW is 1 of 2 things:
1. a sensor needs cleaning and/or changing;
2. a wire has come loose.

This advice has saved me thousands. You just need to read up on sensors and wiring.