BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > M3 (E90 / E92 / E93) > General M3 Forum (E90 + E92 + E93)
 
Post Reply
 
Thread Tools Search this Thread
      10-22-2011, 10:23 AM   #1
M3Now!
First Lieutenant
 
Drives: 09 E93, Jerez Black
Join Date: Sep 2011
Location: Texas

Posts: 372
iTrader: (0)

Just figured out why my key fob battery keeps dying

The battery in my fob was lasting about a month, which was pretty annoying. Today though, I walked out to the car, and just as I touched the door handle thought "crap, don't have my keys." And the door unlocked.

Apparently the range of Convenient Access is greater than the manual says, and the desk where we keep our keys is about ten yards from the car in the garage. Since the fob responds to the car signal by transmitting, ten yards must be close enough for them to constantly communicate, and thus drain the battery. Problem solved!

Cheers
__________________


2009 E93 M3 - it's, um, pretty fun
M3Now! is offline  
0
Reply With Quote
      10-22-2011, 10:41 AM   #2
1sikbmr
Brigadier General
 
1sikbmr's Avatar
 
Drives: E90 M3 6MT
Join Date: Mar 2010
Location: New York

Posts: 3,275
iTrader: (14)

sounds reasonable but I thought that would drain the car battery as well.
__________________

E90 ///M3 6MT Atlantis Blue - Fox red
ESS VT1-550|Gloss black grilles/Gold gills|V1 hardwire|Filled reflectors|ZHP lighted shift knob|Volk TE37 Gloss Black|Mode Carbon GT4 Lip|Umnitza V4 full blackout kit|Agency Power exhaust|Sosi x-pipe|BMW Performance Steering Wheel V1|
1sikbmr is offline  
0
Reply With Quote
      10-22-2011, 11:24 AM   #3
radiantm3
Apex Everything!
 
radiantm3's Avatar
 
Drives: >1000 HP in my garage
Join Date: Sep 2008
Location: Danville, CA

Posts: 3,815
iTrader: (6)

Garage List
2011 E92 M3  [4.80]
2013 BMW X5M  [4.33]
Don't think that is the case. If it is, doesn't sound normal. My keys are 10-15 feet from my car and have been that way for almost a year now. I have yet to replace my battery.
__________________
(1:40 @ Laguna Seca, 2:03 @ Thunderhill, 1:52 @ Infineon)
radiantm3 is offline   United_States
0
Reply With Quote
      10-22-2011, 11:59 AM   #4
Mike van D
Major
 
Mike van D's Avatar
 
Drives: SG X6 35i; MW e92 M3
Join Date: Jan 2011
Location: Germany

Posts: 1,114
iTrader: (0)

Same here, keys within 15 feet and zero problems like that.
__________________
...just enjoying life.
Mike van D is offline   Germany
0
Reply With Quote
      10-22-2011, 12:19 PM   #5
SchnellM3
Digger
 
SchnellM3's Avatar
 
Drives: 03 E46 M3, 09 E92 M3, 09 X6 50
Join Date: Jun 2009
Location: Pa

Posts: 2,616
iTrader: (5)

Garage List
No problems here either
__________________
2009 E92 M3 /// Melbourne Red /// Fox Red /// M DKG

Full Innotech Exhaust - DINAN Intake - IND Engine Bay Appearance - IND Hand Stitched Boot Covers - and much more....
SchnellM3 is offline   United_States
0
Reply With Quote
      10-22-2011, 12:21 PM   #6
M3Now!
First Lieutenant
 
Drives: 09 E93, Jerez Black
Join Date: Sep 2011
Location: Texas

Posts: 372
iTrader: (0)

Hmmm, maybe you're right, I couldn't reproduce it a few minutes ago. Drat.
__________________


2009 E93 M3 - it's, um, pretty fun
M3Now! is offline  
0
Reply With Quote
      10-22-2011, 12:28 PM   #7
abehwang
Captain
 
Drives: e90 m3
Join Date: Mar 2011
Location: US

Posts: 505
iTrader: (0)

my car talks
__________________
2008 E90 M3: Alpine White/ Fox Red Novillo/ Brushed Aluminum | 6MT | Premium | Cold Weather | Technology | EPS | PDC | Ipod/USB |

Fuelly :: Adelei's Gas Mileage
abehwang is offline  
0
Reply With Quote
      10-22-2011, 02:09 PM   #8
thai357sig
First Lieutenant
 
thai357sig's Avatar
 
Drives: M3
Join Date: Jan 2009
Location: Silver Spring MD

Posts: 399
iTrader: (0)

Not so with my car. When I wasH my M, and the FOB is in my pocket, the doors would constantly lock and unlock. So I put the FOB eight feet away sitting on me stereo. No more unwanted locking. Also when done and the doors are locked, I could not unlock it with the eight foot distance.
__________________
09'M3 JerezB/Tech/Cold/Prem/PDC/SR/Black Leather/ANTHRACITE Sycamore/IPOD/USB/Rear Sunshade/Premium Sounnd/6MT***Just Hit The Ground! Delivery 02/25/2009***
thai357sig is offline  
0
Reply With Quote
      10-22-2011, 02:23 PM   #9
GIdriver
Major
 
GIdriver's Avatar
 
Drives: 2012 C63 AMG P31
Join Date: Dec 2010
Location: Somewhere in Time

Posts: 1,341
iTrader: (0)

Quote:
Originally Posted by M3Now! View Post
The battery in my fob was lasting about a month, which was pretty annoying. Today though, I walked out to the car, and just as I touched the door handle thought "crap, don't have my keys." And the door unlocked.

Apparently the range of Convenient Access is greater than the manual says, and the desk where we keep our keys is about ten yards from the car in the garage. Since the fob responds to the car signal by transmitting, ten yards must be close enough for them to constantly communicate, and thus drain the battery. Problem solved!

Cheers
Not normal. The car should not lock/unlock unless the key is really colse to the car.
GIdriver is offline   United_States
0
Reply With Quote
      10-22-2011, 02:25 PM   #10
GIdriver
Major
 
GIdriver's Avatar
 
Drives: 2012 C63 AMG P31
Join Date: Dec 2010
Location: Somewhere in Time

Posts: 1,341
iTrader: (0)

Quote:
Originally Posted by GIdriver View Post
Not normal. The car should not lock/unlock unless the key is really colse to the car.
^correction: ...close to the car
GIdriver is offline   United_States
0
Reply With Quote
      10-22-2011, 07:18 PM   #11
08E92M3
Private
 
Drives: E92 M3 Coupe
Join Date: Dec 2009
Location: Dublin

Posts: 94
iTrader: (0)

Quote:
Originally Posted by thai357sig View Post
Not so with my car. When I wasH my M, and the FOB is in my pocket, the doors would constantly lock and unlock. So I put the FOB eight feet away sitting on me stereo. No more unwanted locking. Also when done and the doors are locked, I could not unlock it with the eight foot distance.
That happened to me a couple of times when I was washing my M, I ended up taking my key out of my pocket & put it somewhere inside the garage. The battery in the key lasted a few months short of 3 years, so, that wasn't too bad!
08E92M3 is offline   United_States
0
Reply With Quote
      10-22-2011, 07:52 PM   #12
elp_jc
Brigadier General
 
Drives: .
Join Date: May 2008
Location: .

Posts: 4,910
iTrader: (0)

Quote:
Originally Posted by M3Now! View Post
Apparently the range of Convenient Access is greater than the manual says, and the desk where we keep our keys is about ten yards from the car in the garage.
Really? I have to drag myself against the door to get the freaking CA to unlock the door . And that's with a NEW battery. And same for starting the car with key in my pocket. Have to try several times until it senses it. POS system IMO. Funny thing is we have a Hyundai and it's been flawless for a year. Hmmmm.
elp_jc is offline   United_States
0
Reply With Quote
      10-23-2011, 01:37 AM   #13
ottoblotto
///M-Flight Bavaria
 
ottoblotto's Avatar
 
Drives: E90M3
Join Date: Apr 2011
Location: Im around

Posts: 1,192
iTrader: (3)

Garage List
2010 BMW X5  [0.00]
2011.75 BMW M3 E90  [5.00]
^^^This.

Acts how it wants to. Sometimes, and its always when someone is looking, I'm standing there pulling the door handle to open and it wont unlock. Or pressing the trunk button and it wont open. PIA. But whenever I'm washing it, boy that sucker wants to lock/unlock all day long. Nevermind that once I get in the car, I sit there pressing the button until I finally have to take the key out and insert it to get the car to start.

I talked to BMW master tech and he said to plug it in every once in a while because it recharges the secondary battery in the FOB. I said ok, tried it(with both keys mind you), and it made 0 difference.

I'm at about 75% "working as advertised" right now.
__________________
"With great power comes great responsibility." -El-Superbeasto
ottoblotto is offline   Germany
0
Reply With Quote
      10-23-2011, 05:59 AM   #14
mkoesel
Moderator
 
Drives: 2015 Felt IA2
Join Date: Jun 2006
Location: Canton, MI

Posts: 13,694
iTrader: (1)

Quote:
Originally Posted by ottoblotto View Post

I talked to BMW master tech and he said to plug it in every once in a while because it recharges the secondary battery in the FOB.
This master tech really ought to read the manual...
__________________
A gen-u-ine BMW eff-eight-zero with them tandem clutches in the transmission and that dad gum sun roof on the top-a da cawr.
mkoesel is offline   United_States
0
Reply With Quote
      10-23-2011, 06:15 AM   #15
Stronghammer
Lieutenant
 
Stronghammer's Avatar
 
Drives: E92 M3
Join Date: May 2011
Location: south carolina

Posts: 580
iTrader: (2)

I think the owners on the only one's that read the manual. Heck my service advisor didn't even have a manual.
__________________
2011 E92 M3 MR July 11 ED Sept 11 PCD
Mods: ESS VT1, MS test pipes, 19 BBS CH-R, Eibach pro springs, Painted reflectors, carbon fiber grills, Painted side markers with dark tinted lenses, 30% tint, Arkym rear diffuser, Innotech axle back exhaust, Performance spoiler
Stronghammer is offline  
0
Reply With Quote
      10-23-2011, 11:51 AM   #16
M3Now!
First Lieutenant
 
Drives: 09 E93, Jerez Black
Join Date: Sep 2011
Location: Texas

Posts: 372
iTrader: (0)

Quote:
Originally Posted by ottoblotto View Post
^^^This.

Acts how it wants to. Sometimes, and its always when someone is looking, I'm standing there pulling the door handle to open and it wont unlock. Or pressing the trunk button and it wont open.
Ha! This happens to me all the time
__________________


2009 E93 M3 - it's, um, pretty fun
M3Now! is offline  
0
Reply With Quote
      10-23-2011, 05:07 PM   #17
Hix
Enlisted Member
 
Drives: 2009 Bmw m3
Join Date: Oct 2011
Location: Houston, tx

Posts: 31
iTrader: (0)

Thing about BMW comfort access is that it works some of the time maybe... Pretty much as long as I am in no hurry and nobody is around. The girl I was dating has a Murano with a similar setup and it always works the first time as soon as she the touches the thumb thing. Really annoying.
Hix is offline  
0
Reply With Quote
      10-24-2011, 09:14 AM   #18
Boostin FD
Major
 
Boostin FD's Avatar
 
Drives: F82 M4
Join Date: Jan 2010
Location: St. Louis

Posts: 1,412
iTrader: (2)

Same thing happens to me often... the other thing that bothers me is that the key fob won't unlock the car if you press the button, unless you are as close as 6ft. In my Audi, i could unlock the car from inside my apartment which is about 50 ft away.
Yet with BMW, you have to be very close... I replaced the darn battery just past weekend.
__________________
Boostin FD is offline   United_States
0
Reply With Quote
      10-24-2011, 09:58 AM   #19
///My5UV
Lurker
 
///My5UV's Avatar
 
Drives: E39M5, E90M3
Join Date: Nov 2010
Location: Austin

Posts: 621
iTrader: (0)

Maybe some of you folks are in an area with alot of radio interference?
I have noticed that the CA barely works if I have the key in the same pocket as my phone.
__________________
///My5UV is offline  
0
Reply With Quote
      10-24-2011, 12:02 PM   #20
Nelrock
Lieutenant
 
Nelrock's Avatar
 
Drives: 2011 E92 M3
Join Date: Jun 2010
Location: Oklahoma

Posts: 516
iTrader: (0)

Quote:
Originally Posted by elp_jc View Post
Really? I have to drag myself against the door to get the freaking CA to unlock the door . And that's with a NEW battery. And same for starting the car with key in my pocket. Have to try several times until it senses it. POS system IMO. Funny thing is we have a Hyundai and it's been flawless for a year. Hmmmm.
I hear that!
I closed the trunk lid on my fob once. It's in the car...the trunk would just reopen right? Uh...no. I had to go hit the trunk release.
__________________

2011 E92 M3 | Melbourne Red | Black Novillo w/Carbon Leather Trim | M-DCT | Competition Package | Premium Package 2 | Convenience Package | Enhanced Premium Sound | Heated Front Seats
2004 E46 M3 | Silver Grey | - Retired
Nelrock is offline   United_States
0
Reply With Quote
      10-24-2011, 12:51 PM   #21
ottoblotto
///M-Flight Bavaria
 
ottoblotto's Avatar
 
Drives: E90M3
Join Date: Apr 2011
Location: Im around

Posts: 1,192
iTrader: (3)

Garage List
2010 BMW X5  [0.00]
2011.75 BMW M3 E90  [5.00]
Quote:
Originally Posted by ///My5UV View Post
Maybe some of you folks are in an area with alot of radio interference?
I have noticed that the CA barely works if I have the key in the same pocket as my phone.
Nope. I took the key out of my pocket, held it in the hand basically laying it on top of the door handle, and still didnt work. This has been from the get go with the car. The first time I brought it up to the tech was three weeks after picking the car up. He swapped out the battery and all was good for a few days. Then it just randomly does what it does...
__________________
"With great power comes great responsibility." -El-Superbeasto
ottoblotto is offline   Germany
0
Reply With Quote
      10-24-2011, 02:16 PM   #22
Mike van D
Major
 
Mike van D's Avatar
 
Drives: SG X6 35i; MW e92 M3
Join Date: Jan 2011
Location: Germany

Posts: 1,114
iTrader: (0)

Know a couple of folks who had the CA not work right and had the door handle cover replaced...said it's fixed the problem so far.
__________________
...just enjoying life.
Mike van D is offline   Germany
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 07:10 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST