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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 12-24-2012, 11:14 AM
raffles999 raffles999 is offline
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Key fob

recently I had dsicussed an issue with a message that flashed on my panel stating

Remote battery discharge. I learned that my comfort access BMW came with fobs that carried the CR2032 batts. I replaced these batts but found that this message is recurring. Is this normal, can I cancel it or is it referring to something else?
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  #2  
Old 12-26-2012, 01:58 AM
rippjd rippjd is offline
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I had the same issue with one of my keys.. Despite changing the CR2302 batter I still would get the warning in the instrument cluster. I just assumed I reached the end of the life for the internal rechargeable battery.
I then had the recall performed for the soft close + comfort access and after the Dealer had the car for 2 weeks due to programming difficulty, the error has not returned. Perhaps my short trips were never enough to charge it?

-edit-
I stand corrected. There is no rechargeable battery in the CA key fob. According to the BMW training literature:
"Since the key does not need to be inserted into the holder to start the vehicle the battery
of the remote control/ID Transmitter is no longer chargeable, therefore requiring the battery
to be replaced. Under "average" usage the the battery may need to be replaced
once a year."
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E65/E66 Parts for Sale:
Alpina Type 743 Front Spoiler complete retrofit kit (new in box) $1200
71 60 6 770 096 WARNING TRIANGLE WITHOUT CONTAINER $40
51 16 7 028 437 & 438 MIRROR GLASS HEATED PLANE LEFT & RIGHT, ELECTROCHROM

Last edited by rippjd; 12-27-2012 at 04:04 PM. Reason: error
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  #3  
Old 12-26-2012, 04:50 AM
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Tenn Tenn is offline
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I had similar issues and started keeping my fob "plugged in" and that has ended the message of low battery for the key.
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Old 12-26-2012, 07:50 AM
raffles999 raffles999 is offline
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Pardon my ignorance but I don't understand how a non rechargeable cr2032 batt. can be affected by how far you travel. Typically I don't plug my key fob into the car. Is this wrong? Does everyone drive with said fob inserted. I am mystified by what should be so simple. If my fob has an unchargeable batt why is the remote batt. discharge being activated??? Thanks for your comments.
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  #5  
Old 12-26-2012, 09:24 AM
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GeorgeT GeorgeT is offline
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If you have Comfort Access, you have a non-rechargeable, replaceable battery in the fob. No amount of driving with it in the slot will charge it. If you have a non-CA car, the rechargeable battery must be in the slot to recharge the battery (you can't start the car without the fob in the slot). The rehcargeable battery is not supposed to be replaced when it reaches it's useful life span but there are DIY's on how to do it.
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  #6  
Old 12-26-2012, 09:42 AM
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1bad540 1bad540 is offline
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Quote:
Originally Posted by raffles999 View Post
Pardon my ignorance but I don't understand how a non rechargeable cr2032 batt. can be affected by how far you travel. Typically I don't plug my key fob into the car. Is this wrong? Does everyone drive with said fob inserted. I am mystified by what should be so simple. If my fob has an unchargeable batt why is the remote batt. discharge being activated??? Thanks for your comments.
sometimes I install it and sometimes I dont, I have changed the batterys a few times with radio shack ones.
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  #7  
Old 12-26-2012, 10:42 AM
raffles999 raffles999 is offline
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Okay this confirms what I thought. I sometimes insert the fob because rightly or wrongly I think maybe any changes to settings might overwrite over old stored data...does that make sense?
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  #8  
Old 01-12-2013, 12:57 PM
raffles999 raffles999 is offline
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I checked my car and the yellow warning "remote batt discharge" is still showing even though I replaced the batts in both fobs. Any ideas on how to reset this warning?
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  #9  
Old 01-12-2013, 01:42 PM
7Rage 7Rage is offline
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... dont know for sure... but w/o obd2 scanner.... worth a shot... its free lol
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  #10  
Old 01-12-2013, 03:56 PM
mrbmwx5 mrbmwx5 is offline
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Originally Posted by 7Rage View Post
... dont know for sure... but w/o obd2 scanner.... worth a shot... its free lol
Got to love the black tape on that cluster Hiding the check engine light...
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  #11  
Old 01-12-2013, 04:19 PM
7Rage 7Rage is offline
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Originally Posted by mrbmwx5 View Post
Got to love the black tape on that cluster Hiding the check engine light...


I use duct tape... i think the silver goes with the chrome better....
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  #12  
Old 01-12-2013, 04:39 PM
raffles999 raffles999 is offline
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Thanks for the feedback....
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  #13  
Old 02-28-2014, 03:25 PM
raffles999 raffles999 is offline
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Key fob courtesy access

Thank each of you for help with trickle charging my battery which I recently posted. Car is now running again just fine. It has revealed however that one of the KEY Fobs will no longer open or access the car, I have checked and replaced the battery in the Fob to no avail. Is there anyway for me to reprogram the FOB? Can I insert it into the dash receptacle for this purpose? I guess my dealership will probably charge a bundle to do this hence my query here. I am battling chemo currently and my funds are limited. I appreciate any suggestions that will help.....Thanx again
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  #14  
Old 03-01-2014, 08:09 PM
Busarider Busarider is offline
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Hey Raffles...sorry to hear about the chemo, just hang in there.
Maybe there is a small glitch with the CAS which I'm sure a reset is required. Check for any codes.
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