Comfort Access Stopped Working

Hokie_BMW · 09-12-2013, 04:44 PM

Hey guys,
So my comfort access has stopped working. I can't unlock the doors by grabbing the handle but I CAN lock them from the driver door. The trunk release also doesn't work unless I have the doors unlocked or hit the button on the key fob even when i have the key right next to the trunk handle.

I've heard of the door handle unlock function stop working but never the trunk as well which makes me think it's not just the door handle that has a bad sensor or whatever.

Any ideas?

dominick · 09-12-2013, 09:29 PM

change the battery?

bimmerdavid · 09-12-2013, 09:54 PM

Quote:

Originally Posted by dominick

change the battery?

+1... Anything else seem to not be working or acting strange? Batteries can cause all sorts of different havoc when they are getting low

Hokie_BMW · 09-13-2013, 02:20 AM

I have been getting a battery light occasionally. Maybe that's it... I'll replace it and report back.

Thanks

curiouz_g · 09-13-2013, 07:44 AM

Definitely the battery. Just had this happen to me

Hokie_BMW · 09-13-2013, 08:18 AM

Is there a protocol to changing the battery or any special process? I can't remember if there is a specific process to changing it or if you can just take the old one out and replace it. Don't want to mess up the electronics

smallseafishie · 09-13-2013, 10:41 AM

No special procedure, just replace. Make sure you get a quality name brand battery and not some $1 store knockoff one.

Hokie_BMW · 09-13-2013, 03:14 PM

Quote:

Originally Posted by smallseafishie

No special procedure, just replace. Make sure you get a quality name brand battery and not some $1 store knockoff one.

Recommendations? Not BMW brand haha

originalgoods13 · 09-13-2013, 04:15 PM

I am using Panasonic bought for $2 at a local Dollar Store. Brand new battery means you can lock and unlock with the fob at least 25 feet away

SubzeroVR4 · 09-13-2013, 04:38 PM

Try putting the fob in the slot and start the car. Sometimes doing that will help reset my CA.

Hokie_BMW · 09-13-2013, 05:01 PM

Oh I think there was a misunderstanding. I just replaced my fob key. But my car battery is also low as I get the battery symbol occasionally. Would a low car battery affect that?

808AWD325xi · 09-13-2013, 09:48 PM

Could be the door actuators or a fuse.

http://www.e90post.com/forums/showthread.php?t=392593

Yvette · 09-13-2013, 11:25 PM

I have this too,
passenger side unlock with a finger tip at the door knob, but driver side doesn't work.
I can no longer start the car with fob in my pocket...
well I do have 5 years old battery, but I don't think its the battery.
And I did changed battery in the fob with duracell ones. It does its job lock/unlock from 25feet away

Lucky13 · 09-14-2013, 02:14 PM

Quote:

Originally Posted by Hokie_BMW

Oh I think there was a misunderstanding. I just replaced my fob key. But my car battery is also low as I get the battery symbol occasionally. Would a low car battery affect that?

Yes it can be the car battery, just replaced mine on a 2007 E93 and my comfort access worked afterwords and it had problems before.

Yvette · 09-14-2013, 03:00 PM

Quote:

Originally Posted by Lucky13

Yes it can be the car battery, just replaced mine on a 2007 E93 and my comfort access worked afterwords and it had problems before.

what kind problems occurred before you changed out the battery?

Lucky13 · 09-14-2013, 09:22 PM

I could touch the door handle and nothing would happen and my convertible top wouldn't go up sometimes which was car battery related.

BigFoig · 09-15-2013, 02:57 AM

If car replacing batter on the key dowsnt work. It's the car battery.

A418t81 · 09-15-2013, 07:48 PM

If you are getting the square battery symbol on your dash when you start your car, your battery is on it's way out. Your 335 has a smart electronics system that constantly monitors battery voltage and will start turning off non-essential systems in a step-wise fashion as voltage drops. The comfort access system is one of the first ones to be shut down. When it won't work, you can use the regular buttons on the key fob to get in the car. When you crank it, it should also give you a car on a lift symbol in green.

Replace your car's battery and your CA will be back again, good as new.

bman5150 · 10-21-2013, 08:49 AM

Rather than starting another thread....how exactly do I replace my comfort access fob battery? Thx

09-12-2013, 04:44 PM	#1
Hokie_BMW Captain 59 Rep 661 Posts Drives: 2009 335i Sedan Join Date: Apr 2013 Location: NC iTrader: (0)	Comfort Access Stopped Working Hey guys, So my comfort access has stopped working. I can't unlock the doors by grabbing the handle but I CAN lock them from the driver door. The trunk release also doesn't work unless I have the doors unlocked or hit the button on the key fob even when i have the key right next to the trunk handle. I've heard of the door handle unlock function stop working but never the trunk as well which makes me think it's not just the door handle that has a bad sensor or whatever. Any ideas?
	Appreciate 0 Tweet Quote

09-12-2013, 09:29 PM	#2
dominick Private First Class 1 Rep 119 Posts Drives: 08 335i Join Date: Jun 2011 Location: S. Florida iTrader: (2)	change the battery?
	Appreciate 0 Quote

09-13-2013, 02:20 AM	#4
Hokie_BMW Captain 59 Rep 661 Posts Drives: 2009 335i Sedan Join Date: Apr 2013 Location: NC iTrader: (0)	I have been getting a battery light occasionally. Maybe that's it... I'll replace it and report back. Thanks
	Appreciate 0 Quote

09-13-2013, 07:44 AM	#5
curiouz_g Private First Class 3 Rep 132 Posts Drives: 2008 335i, 04 M3 Vortech'd Join Date: Aug 2013 Location: Washington DC iTrader: (1)	Definitely the battery. Just had this happen to me __________________ Daily grinder: 2008 BMW M3 6spd Supercharged Weekend thrasher: 2004 BMW M3 6spd Supercharged
	Appreciate 0 Quote

09-13-2013, 08:18 AM	#6
Hokie_BMW Captain 59 Rep 661 Posts Drives: 2009 335i Sedan Join Date: Apr 2013 Location: NC iTrader: (0)	Is there a protocol to changing the battery or any special process? I can't remember if there is a specific process to changing it or if you can just take the old one out and replace it. Don't want to mess up the electronics
	Appreciate 0 Quote

09-13-2013, 10:41 AM	#7
smallseafishie Colonel 110 Rep 2,017 Posts Drives: AW 07 e92 335i + AW 11 X5 35d Join Date: Jun 2007 Location: Atlanta GA iTrader: (13) Garage List 2007 E92 335i [0.00]	No special procedure, just replace. Make sure you get a quality name brand battery and not some $1 store knockoff one.
	Appreciate 0 Quote

09-13-2013, 04:15 PM	#9
originalgoods13 Captain 290 Rep 625 Posts Drives: Chevy Spark Join Date: Oct 2012 Location: Calgary, Canada iTrader: (0)	I am using Panasonic bought for $2 at a local Dollar Store. Brand new battery means you can lock and unlock with the fob at least 25 feet away
	Appreciate 0 Quote

09-13-2013, 04:38 PM	#10
SubzeroVR4 Second Lieutenant 70 Rep 276 Posts Drives: F80 M3/F85 X5M Join Date: Jun 2012 Location: California iTrader: (0)	Try putting the fob in the slot and start the car. Sometimes doing that will help reset my CA. __________________ '16 BMW M3 '16 BMW X5M '23 X3 M40i (On Order) '21 Civic Type R
	Appreciate 0 Quote

09-13-2013, 05:01 PM	#11
Hokie_BMW Captain 59 Rep 661 Posts Drives: 2009 335i Sedan Join Date: Apr 2013 Location: NC iTrader: (0)	Oh I think there was a misunderstanding. I just replaced my fob key. But my car battery is also low as I get the battery symbol occasionally. Would a low car battery affect that?
	Appreciate 0 Quote

09-13-2013, 09:48 PM	#12
808AWD325xi Ballin' out of control. 520 Rep 1,289 Posts Drives: 2009 335i Join Date: Jul 2007 Location: Moline, IL iTrader: (0)	Could be the door actuators or a fuse. http://www.e90post.com/forums/showthread.php?t=392593
	Appreciate 0 Quote

09-13-2013, 11:25 PM	#13
Yvette Major General 761 Rep 7,408 Posts Drives: M Join Date: Sep 2006 Location: Vancouver iTrader: (19)	I have this too, passenger side unlock with a finger tip at the door knob, but driver side doesn't work. I can no longer start the car with fob in my pocket... well I do have 5 years old battery, but I don't think its the battery. And I did changed battery in the fob with duracell ones. It does its job lock/unlock from 25feet away
	Appreciate 0 Quote

09-14-2013, 09:22 PM	#16
Lucky13 Lucky13 212 Rep 1,762 Posts Drives: 2014 M235 manual, 2020 X3 30X Join Date: Mar 2007 Location: Columbia, S.C. iTrader: (0)	I could touch the door handle and nothing would happen and my convertible top wouldn't go up sometimes which was car battery related. __________________ 1995 325i, 1996 328ci, 1997 528i, 1997 Z3 2.8, 2000 528i, 2001 X5 3.0, 2001 330i Convertible, 2002 M3 Convertible, 2003 M3 Coupe, 2004 M3 Coupe, 2004 Z4 3.0, 2004 X3 3.0, 2007 X3 3.0, 2007 335i Convertible, 2013 X1 28 sdrive, 2014 M235 manual, 2020 X3 30i Xdrive
	Appreciate 0 Quote

09-15-2013, 02:57 AM	#17
BigFoig Banned 28 Rep 246 Posts Drives: e92 335is Join Date: Sep 2012 Location: Toronto iTrader: (2)	If car replacing batter on the key dowsnt work. It's the car battery.
	Appreciate 0 Quote

09-15-2013, 07:48 PM	#18
A418t81 Lieutenant Colonel 296 Rep 1,515 Posts Drives: Ever changing fleet Join Date: May 2007 Location: Alabama iTrader: (1) Garage List 2013 335is [0.00]	If you are getting the square battery symbol on your dash when you start your car, your battery is on it's way out. Your 335 has a smart electronics system that constantly monitors battery voltage and will start turning off non-essential systems in a step-wise fashion as voltage drops. The comfort access system is one of the first ones to be shut down. When it won't work, you can use the regular buttons on the key fob to get in the car. When you crank it, it should also give you a car on a lift symbol in green. Replace your car's battery and your CA will be back again, good as new. __________________ 23 iX M60, 24 GT3 RS Weissach, 22 Rivian R1T, 23 RS3, 13 E92 M3 Competition: Akra Evo, KW V3, etc
	Appreciate 0 Quote

10-21-2013, 08:49 AM	#19
bman5150 Second Lieutenant 40 Rep 290 Posts Drives: 2011 BMW 335i M-Sport (sold) Join Date: Apr 2007 Location: C-Bus, OH iTrader: (0)	Rather than starting another thread....how exactly do I replace my comfort access fob battery? Thx __________________ 2011 BMW 335i XDrive Msport (auto)
	Appreciate 0 Quote