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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > New comfort access key fob needs charging?



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      04-01-2009, 07:43 AM   #1
tjnptel1
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New comfort access key fob needs charging?

The emblem on my old key got scratched up, and became non-existant. So the SA replaced it under warranty. When I picked up the car today, he told me to keep it plugged in the slot for a few times(and not keep it in the pocket like i would) so it can charge the battery.

I asked him if he was sure about this because in the manual it says comfort access keys can't recharge and the batteries will need to be replaced after a while. He confirmed and said the battery should last a few years before replacing since placing it in the slot would recharge it.
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      04-01-2009, 07:47 AM   #2
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I was told by my SA that CA keys do not have a rechargeable battery...
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      04-01-2009, 07:51 AM   #3
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hahaha....I was told to keep the fob in the slot for it to recharge (CA with that fob was not working). I read the manual and soon discovered the fob was ACTUALLY MISSING THE BATTERY!

I called back, told them dude, i need a battery for CA to work. See, open here - no don't use your key!, insert battery here, voila! c'est magnifique! non?

I'm not aware that CA option charges battery. If it does, hey i'm a happy camper.
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      04-01-2009, 07:52 AM   #4
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Quote:
Originally Posted by xs***** View Post
I was told by my SA that CA keys do not have a rechargeable battery...
i believe this is correct. But my SA was so adamant that it does need charging.
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      04-01-2009, 07:53 AM   #5
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Your SA is wrong. The CA fobs have a replaceable and non-rechargeable battery. Your car will give you an alert when the battery is low. Putting it in the slot does nothing except satisfy some perverse fantasy...;-)

If you don't get the alert then your battery is fine. To replace battery, remove the metal key. Then you'll see a little slot. Pry it open with a fine flat headed screwdriver.
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      04-01-2009, 07:54 AM   #6
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Quote:
Originally Posted by fnckr View Post
Your SA is wrong. The CA fobs have a replaceable and non-rechargeable battery. Your car will give you an alert when the battery is low. Putting it in the slot does nothing except satisfy some perverse fantasy...;-)

If you don't get the alert than your battery is fine. To replace battery, remove the metal key. Then you'll see a little slot. Pry it open with a fine flat headed screwdriver.
i like inserting in slots.
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      04-01-2009, 07:56 AM   #7
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Quote:
Originally Posted by tjnptel1 View Post
i like inserting in slots.
lol.
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      04-01-2009, 08:00 AM   #8
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Quote:
Originally Posted by tjnptel1 View Post
i like inserting in slots.
Seems you like licking them too... But, despite your skills, your Bavarian beauty still won't get a charge out of it.
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      04-01-2009, 08:02 AM   #9
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Seems you like licking them too... But, despite your skills, your Bavarian beauty still won't get a charge out of it.
darn.
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      04-01-2009, 09:36 AM   #10
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CA only can have two active key fobs. If they did not disable the one they replaced and activate your new one than the new one will not work with CA only as a standard key. When my key was replaced it did not work until the dealer programed the CA computer to recognize the original key and the new key. The current keys had to be present so they could program the correct ones in the computer
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      04-01-2009, 10:00 AM   #11
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Quote:
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i like inserting in slots.
+1
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      04-01-2009, 03:09 PM   #12
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my sa told me to place it in the slot like twice a year
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      04-01-2009, 03:12 PM   #13
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Quote:
Originally Posted by slupie View Post
CA only can have two active key fobs. If they did not disable the one they replaced and activate your new one than the new one will not work with CA only as a standard key. When my key was replaced it did not work until the dealer programed the CA computer to recognize the original key and the new key. The current keys had to be present so they could program the correct ones in the computer
Same here, had to get my new key reprogrammed. The batteries are not rechargable.
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      04-01-2009, 03:16 PM   #14
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Quote:
Originally Posted by EMG E92 View Post
my sa told me to place it in the slot like twice a year
If you have CA (Comfort Access), then your SA (Service Advisor) does not know what he's talking about.

CA (Comfort Access) = replaceable battery, cannot charge.

No CA (Comfort Access) = rechargeable battery. Plus, you will need to insert the key to start the car, so it will charge the battery when the key is inserted.
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      04-01-2009, 03:31 PM   #15
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Two things:

1 - CA key fob does NOT recharge. No ifs, ands or buts, no exceptions, no caveats. It DOES NOT RECHARGE. Lots of SAs are wrong about this.

2 - CA key fob only retains codes thrown by the car when it's in the slot. This is why your SA will stick the key in the slot when you come in for service and before using the key reader. It also may be why some SAs ask customers to put the key in the slot every once in a while, so the data gets logged.

#2 above is entirely heresay, summarizing other discussions here at e90post and between me and my SA, so I can't say with 100% certainty that it is accurate.

But for #1, it's 100% certain, the CA key doesn't recharge in the slot.
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      04-01-2009, 04:49 PM   #16
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Quote:
Originally Posted by slupie View Post
CA only can have two active key fobs. If they did not disable the one they replaced and activate your new one than the new one will not work with CA only as a standard key. When my key was replaced it did not work until the dealer programed the CA computer to recognize the original key and the new key. The current keys had to be present so they could program the correct ones in the computer
Apparently that was only in 2007. My wifes 08 E92 has three (Me, Her, and my son) and they all work as advertised. Our owners manual even says up to three.....and the car programmed it, dealer didn't have to (he said that was new to the 08's as well).

Just an FYI
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      04-01-2009, 08:20 PM   #17
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CA fob has a non rechargeable battery. The design of the CA fob is slightly different as it has the battery access 'flap' which is not present on the non-CA fob.

If it was rechargeable, I see no reason why it would have the flap - it would be identical to the non-CA fob.

Also...page 35 of the 2009 manual - The remote control for cars with convernient access contains a battery that will need to be replaced from time to time.
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      04-01-2009, 08:42 PM   #18
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Page 28


Page 38

Show that to your SA. Last word.
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      04-01-2009, 09:19 PM   #19
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I just replaced my battery used a energizer cr2032 heres a pic sorry if its crappy took it with my BB8900
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