FORUMS
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| 02-01-2010, 12:00 PM | #1 |
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Lieutenant
 Drives: 2008 M3 Sedan 6MT Join Date: Jul 2006
Location: San Diego
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Comfort access FOB battery
One of my FOB has stopped working, cannot lock the car anymore and needed to insert it in the slot to start it. Car is only a year old so kind of surprised the battery is dead.
Anyways I popped it open and saw replaceable battery. I called up my local dealer to see if they could replace it and they told me it is rechargeable and I just need to put it in the slot. Told him I had comfort access and he again he told me it is rechargeable. To me it looks like a standard replaceable battery that I assume does not charge. So what is up? thanks jeff |
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| 02-01-2010, 12:04 PM | #2 |
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Colonel
 
Drives: With a sunroof and front plate Join Date: May 2009
Location: Bergen County NJ
Posts: 2,057
iTrader: (0)
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It charges indirectly in the slot or so am told. I always cycle my key fobs and insert it every now and then into the slot to avoid something like this from happening. Bring both sets of keys and take a long drive with the dead key fobs plugged and see how it goes from there. Good luck and keep us updated.
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| 02-01-2010, 12:10 PM | #4 |
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Lieutenant
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+1. Comfort access keys do not have the inductive coupling recharging feature - you have to buy a new battery.
I'm surprised your service advisor didn't know this.
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"Anima sana in corpore sano"
2009 DCT M3 in Azurite - gone, but not forgotten.... |
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| 02-01-2010, 12:20 PM | #7 |
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Lieutenant
Drives: 2008 M3 Sedan 6MT Join Date: Jul 2006
Location: San Diego
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yeah I was kind of surprised, think he has the opposite problem, probably most people do not have comfort access and come in complaining about the dead battery.
looks like a standard battery you can buy anywhere |
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| 02-01-2010, 12:24 PM | #8 |
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First Lieutenant
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Yep you can buy these batteries anywhere for a couple bucks! I've replaced mine too.
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| 02-01-2010, 12:32 PM | #9 | ||
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Moderator
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Quote:
Comfort access key fob doesn't have a rechargeable battery; non-comroft access fob does. Quote:
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2008 Interlagos Blue E93 M3 - M-DCT
2011 Salsa Red Jetta TDI Sportwagen - DSG  |
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| 02-01-2010, 12:48 PM | #10 |
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New Member
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Was certainly thinking it was rechargeable as I have been told that it was. According to the owners manual:
"Each remote control contains a rechargeable battery that is automatically recharged when it is in the ignition lock while the car is being driven. Use each remote control at least twice a year for longer road trips in order to maintain the batteries' charge staus. In cars with convenient access* the remote control contains a replaceable battery, replace battery + side up... all that said, I was told the battery in my FOB was rechargeable. I was getting the low battery indicator and put the FOB in the ignition lock and the low battery warning indicator hasn't come back..... |
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| 02-01-2010, 03:01 PM | #12 | |
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Major
 Drives: '09 M3 DCT Coupe Join Date: Apr 2008
Location: Eastern Oregon... They call 'em rigs here
Posts: 1,045
iTrader: (0)
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Quote:
This isn't complicated. It's a battery. It's not rechargeable. They don't normally last more than a year, sometimes less. You can get them for a couple bucks at any store. Battery type 2032. Buy three, and throw an extra one in the glove box. Don't know why there is so much confusion about this. Well, I guess misinformation spread by uninformed dealers doesn't help. |
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| 02-01-2010, 05:29 PM | #14 |
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Lieutenant
Drives: 2008 M3 Sedan 6MT Join Date: Jul 2006
Location: San Diego
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well for me it ended up not being the battery, I just stopped by during lunch and had to leave before they figured out the issue
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| 02-01-2010, 07:39 PM | #15 |
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Private First Class
 
Drives: 09 M3 E90 DCT Silverstone Join Date: Jun 2009
Location: South San Francisco
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After I had my new car for a month, the key fob started to have problems. They changed the battery and still gave me problems. Turned out the comfort access module needed to be replaced altogether.
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 09 E90 MDCT Silverstone, Black Extended, Prem/Tech/Cold, Carbon Leather, 19's, Enhanced Sound, IPod, PDC, 3M clear bra, 3M tint 35% front, 20% rear, painted reflectors |
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| 02-02-2010, 04:31 AM | #16 |
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Captain
Drives: '09 Space Gray E92 M3 w/DCT Join Date: Aug 2005
Location: Eugene, Oregon
Posts: 626
iTrader: (0)
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Now let's suppose you have 2 M3's, one with CA and one without. So if I drive the M3 with CA, can I bring along the fob from the other, non-CA M3 and plug it into the slot and recharge the battery without driving the non-CA M3.
This keeps me up at night..."What if....?" |
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| 02-02-2010, 10:17 AM | #17 | |
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Major
Drives: '09 M3 DCT Coupe Join Date: Apr 2008
Location: Eastern Oregon... They call 'em rigs here
Posts: 1,045
iTrader: (0)
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Quote:
 That's ok, somebody has to do it. |
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| 02-02-2010, 01:26 PM | #19 |
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Second Lieutenant
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What Kind Of Sa Is That?!?
Has That Person Seen Any Of The Bmw Key Fobs Before?!? It's A Typical Case Of Lacking Of Basic Analytical Thinking. Simply Ask, I Wonder How The Key Fobs Could Be Charged, Since There Aren't Any "charging" Contact Terminals On It.. What A Joke... |
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| 02-02-2010, 02:07 PM | #20 | |
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Lieutenant
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Quote:
If you have an electric toothbrush, have a look at it. No metal contacts for charging. Google "Inductive charging". I think perhaps your "basic analytical thinking" is somewhat lacking....  The non-comfort access FOB WILL indeed charge, when inserted into the dashboard. The comfort access FOB will not.
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"Anima sana in corpore sano"
2009 DCT M3 in Azurite - gone, but not forgotten.... |
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