BMW M3 Forum (E90 E92)

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


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Coding / ConnectedDrive / Audio-Video / Electronics / Bluetooth / I-Drive & Nav
 
Race Precision Motorsport
Post Reply
 
Thread Tools Search this Thread
      08-08-2013, 07:56 AM   #1
adc
Brigadier General
 
Drives: 2009 E90 M3 ED
Join Date: Sep 2006
Location: MD/DC

Posts: 4,113
iTrader: (6)

Help, key acting strangely

I've recently used a key which had been sitting around for awhile and it behaves a little erratically. Sometimes the alarm goes off on its own, the lock button stops working temporarily, or the unlock button opens the trunk.

Could the key battery be depleted? And if so, does it get recharged when put in the ignition slot? Or do I need a new battery?

I don't have CA, just the regular key with the alarm option. Any suggestions would be highly appreciated!
__________________

2009 E90 M3 ED
2014 X1 28i ED
adc is offline  
0
Reply With Quote
      08-08-2013, 08:16 AM   #2
kscarrol
Colonel
 
Drives: 2011 E90 M3
Join Date: Jun 2010
Location: New Orleans, LA

Posts: 2,162
iTrader: (0)

Could be a low battery. Not having CA means the key charges while in the ignition slot. Let it recharge and see if that resolves your issues...
__________________
Current: 2011 Space Grey E90 M3, DCT, Comp. Pkg., Conv. Pkg., everything but Cold Weather Pkg!
Gone: 2008 550, Space Grey, Sports Package, Sport Auto Transmission.
Sold: 2004 545i (U.S.), Steptronic, Silver Gray.
kscarrol is offline   United_States
0
Reply With Quote
      08-08-2013, 12:53 PM   #3
Sleeper519
Captain
 
Sleeper519's Avatar
 
Drives: 08 E92 M3 DCT
Join Date: Nov 2009
Location: Atlanta, GA

Posts: 746
iTrader: (0)

If the battery is way depleted it may not recharge. I would just change the battery in the key fob, it opens up and has a small camera-like battery that you can buy at the drug store.
__________________

2008 M3 Coupe / DCT // StopTech BBK 380/355 / Pagid RS29 / Motul / Apex Arc-8 / BFG R1S / Ground Control / MS filter / Performance spoiler / BPM tune // Road Atlanta 1:39.80 / VIR Full 2:10.87 / Barber 1:42.20
Sleeper519 is offline   United_States
0
Reply With Quote
      08-08-2013, 02:13 PM   #4
kscarrol
Colonel
 
Drives: 2011 E90 M3
Join Date: Jun 2010
Location: New Orleans, LA

Posts: 2,162
iTrader: (0)

Hmmm... Be careful when replacing the battery on a non-CA car. CA equipped cars use a non-rechargeable watch battery available at any drug store but non-CA equipped cars use a rechargeable battery. Not sure those are simply available at the drug store...
__________________
Current: 2011 Space Grey E90 M3, DCT, Comp. Pkg., Conv. Pkg., everything but Cold Weather Pkg!
Gone: 2008 550, Space Grey, Sports Package, Sport Auto Transmission.
Sold: 2004 545i (U.S.), Steptronic, Silver Gray.
kscarrol is offline   United_States
0
Reply With Quote
      08-08-2013, 03:06 PM   #5
Sleeper519
Captain
 
Sleeper519's Avatar
 
Drives: 08 E92 M3 DCT
Join Date: Nov 2009
Location: Atlanta, GA

Posts: 746
iTrader: (0)

Mine is CA, and is rechargeable, and is replaceable, too. I wasn't aware of the difference between the non-CA.
__________________

2008 M3 Coupe / DCT // StopTech BBK 380/355 / Pagid RS29 / Motul / Apex Arc-8 / BFG R1S / Ground Control / MS filter / Performance spoiler / BPM tune // Road Atlanta 1:39.80 / VIR Full 2:10.87 / Barber 1:42.20
Sleeper519 is offline   United_States
0
Reply With Quote
      08-08-2013, 06:12 PM   #6
kscarrol
Colonel
 
Drives: 2011 E90 M3
Join Date: Jun 2010
Location: New Orleans, LA

Posts: 2,162
iTrader: (0)

CA keys are not rechargeable, they use a simple CR2032 battery. You can put the key fob in the ignition slot but it does not charge. The non-CA key does charge in the ignition slot... It has been this way since CA was introduced, having had CA on my '08 550 and and my '11 M3.
__________________
Current: 2011 Space Grey E90 M3, DCT, Comp. Pkg., Conv. Pkg., everything but Cold Weather Pkg!
Gone: 2008 550, Space Grey, Sports Package, Sport Auto Transmission.
Sold: 2004 545i (U.S.), Steptronic, Silver Gray.
kscarrol is offline   United_States
0
Reply With Quote
      08-08-2013, 06:39 PM   #7
alee0729
Lieutenant
 
alee0729's Avatar
 
Drives: 2013 E92 M3, 2001 E46 330Ci
Join Date: Mar 2013
Location: New York, NY

Posts: 421
iTrader: (0)

How long should a CA key battery last?
__________________
2001 E46 330Ci - 43K miles, 2013 E92 M3 - Back from PCD
Thinking about doing European Delivery? Read about my ED experience. Best trip, ever.
alee0729 is offline  
0
Reply With Quote
      08-08-2013, 07:10 PM   #8
kscarrol
Colonel
 
Drives: 2011 E90 M3
Join Date: Jun 2010
Location: New Orleans, LA

Posts: 2,162
iTrader: (0)

Good question! I changed my battery for my M3 key a couple of months ago as it seemed to not work consistently. Had never changed the battery on my Sept 2010 built car so 2.5+ years. What I can't be sure of is if the dealer ever changed it for me during a normal service. Never changed my key in three years of owning my '08 550 but I think the dealer changed it once during a regular service.
__________________
Current: 2011 Space Grey E90 M3, DCT, Comp. Pkg., Conv. Pkg., everything but Cold Weather Pkg!
Gone: 2008 550, Space Grey, Sports Package, Sport Auto Transmission.
Sold: 2004 545i (U.S.), Steptronic, Silver Gray.
kscarrol is offline   United_States
0
Reply With Quote
      08-08-2013, 08:23 PM   #9
alee0729
Lieutenant
 
alee0729's Avatar
 
Drives: 2013 E92 M3, 2001 E46 330Ci
Join Date: Mar 2013
Location: New York, NY

Posts: 421
iTrader: (0)

So I guess changing every 2 yrs would be a good pattern to follow. I've got a zillion CR2032 batteries around. Maybe I'll throw a set in the glove box.
__________________
2001 E46 330Ci - 43K miles, 2013 E92 M3 - Back from PCD
Thinking about doing European Delivery? Read about my ED experience. Best trip, ever.
alee0729 is offline  
0
Reply With Quote
      08-08-2013, 08:29 PM   #10
kscarrol
Colonel
 
Drives: 2011 E90 M3
Join Date: Jun 2010
Location: New Orleans, LA

Posts: 2,162
iTrader: (0)

Agreed on the 2 yrs but I have never experienced an outright failure. I have noticed the CA not working as advertised on occasion and that is usually a good indicator to change the battery...
__________________
Current: 2011 Space Grey E90 M3, DCT, Comp. Pkg., Conv. Pkg., everything but Cold Weather Pkg!
Gone: 2008 550, Space Grey, Sports Package, Sport Auto Transmission.
Sold: 2004 545i (U.S.), Steptronic, Silver Gray.
kscarrol is offline   United_States
0
Reply With Quote
      08-09-2013, 07:03 AM   #11
Sleeper519
Captain
 
Sleeper519's Avatar
 
Drives: 08 E92 M3 DCT
Join Date: Nov 2009
Location: Atlanta, GA

Posts: 746
iTrader: (0)

Quote:
Originally Posted by kscarrol View Post
CA keys are not rechargeable, they use a simple CR2032 battery. You can put the key fob in the ignition slot but it does not charge. The non-CA key does charge in the ignition slot... It has been this way since CA was introduced, having had CA on my '08 550 and and my '11 M3.
Thanks, I stand corrected. I could have sworn that my key improved after plugging it in!---probably a placebo effect. Go figure.

So, there is never a need for me to plug in my CA key into the ignition slot? I'll continue to just change out the battery.
__________________

2008 M3 Coupe / DCT // StopTech BBK 380/355 / Pagid RS29 / Motul / Apex Arc-8 / BFG R1S / Ground Control / MS filter / Performance spoiler / BPM tune // Road Atlanta 1:39.80 / VIR Full 2:10.87 / Barber 1:42.20
Sleeper519 is offline   United_States
0
Reply With Quote
      08-09-2013, 07:34 AM   #12
kscarrol
Colonel
 
Drives: 2011 E90 M3
Join Date: Jun 2010
Location: New Orleans, LA

Posts: 2,162
iTrader: (0)

Correct, no need to plug in the key. Only time mine has been plugged in by the occasional valet who doesn't know the system. Otherwise it stays in my pocket.
__________________
Current: 2011 Space Grey E90 M3, DCT, Comp. Pkg., Conv. Pkg., everything but Cold Weather Pkg!
Gone: 2008 550, Space Grey, Sports Package, Sport Auto Transmission.
Sold: 2004 545i (U.S.), Steptronic, Silver Gray.
kscarrol is offline   United_States
0
Reply With Quote
      08-09-2013, 11:00 AM   #13
mosx
The mod bug has bitten.
 
Drives: 2008 M3 Sedan
Join Date: Jun 2010
Location: North Texas

Posts: 565
iTrader: (1)

Garage List
2008 BMW M3  [0.00]
Going on 5 years here and I've never replaced the battery in my CA key. Still works like a champ.
mosx is offline   United_States
0
Reply With Quote
      08-16-2013, 12:26 AM   #14
MRV99
Drank the Koolaid
 
MRV99's Avatar
 
Drives: 2011 M3 DCT
Join Date: Aug 2012
Location: Naperville

Posts: 410
iTrader: (0)

I have had my fare share of CA issues with bmw's (long story) My wife's key was going nuts so I did this. Replaced the battery, used the key in the fob to lock/unlock the care, then put the CA fob in the dash, start the car, shut it off, remove the fob and all was well. I read this in another thread and it worked like a charm. worth a shot.
__________________

12 X5 50i Sport w/ Adaptive drive -- 11 M3 DCT
--- Laid to rest----
2011 X5 50i (Lemon) -- 2008 550 Msport -- 2007 x5 4.8 sport -- 2004 545 sport -- 2002 x5 4.4 sport -- 2001 540i Msport 2000 SL500 -- 1997 SL500
MRV99 is offline   United_States
0
Reply With Quote
      08-22-2013, 03:42 PM   #15
pkimM3r
Major General
 
pkimM3r's Avatar
 
Drives: m3 saloon in granny mode.
Join Date: Dec 2009
Location: lost angeles

Posts: 7,325
iTrader: (0)

i can't find my second key its somewhere in my apt....dammit.
pkimM3r is offline  
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 03:54 AM.




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