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my key FOB is dying...can I revive it?
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12-21-2013, 12:27 AM | #1 |
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my key FOB is dying...can I revive it?
I have been using this california (non-comfort access) key fob for a while and it has worked well then today it can't start the engine. It seems to turn on the electronics of the car as usual but won't start the engine. It unlocks, locks, opens the trunk ok. I tried my spare and it is able to turn the engine. Should I just change the battery inside? Any recommendations? Thank you in advance!
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12-21-2013, 05:06 AM | #2 |
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The car should tell you when the comfort access key reaches the minimal batter level. Even if you're not getting that indicator it is worth the $5 and a trip to Radio Shack.
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12-21-2013, 07:25 AM | #3 |
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+1 above. Sounds like you've never changed that battery and your car's an '07? 6 years for that button cell's a good run.
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12-21-2013, 09:13 AM | #7 | |
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Basically the remote "lock/unlock" functions and the "start the car" functions are two different systems enclosed in the key casing. |
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12-21-2013, 09:51 AM | #8 |
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but it's not comfort access though. I've looked inside and it does have a battery, however, it does open and close the door ok, it just wont start the engine. Something to do with the chip inside the actual key?
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12-21-2013, 09:54 AM | #9 |
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12-21-2013, 10:09 AM | #10 |
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12-21-2013, 11:06 AM | #11 |
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12-21-2013, 04:10 PM | #13 |
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12-21-2013, 04:49 PM | #14 |
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Silly narcissistic Californians
When people talk about CA key fobs they mean comfort/convenient access, not California. When you find out how much the dealer will rape you for a new one, you'll wish it was a Kentucky key fob... |
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12-21-2013, 06:05 PM | #17 |
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Thank you for the clarification. It's a Non-CA fob. Yes, it seems I will get raped because I don't know how else to get a spare going.
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12-21-2013, 06:51 PM | #18 | |
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12-22-2013, 02:51 AM | #20 |
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If it has a cover you can open to see the battery .
If it has a cover you can open to see the battery
and the battery is replaceable it has to be a Comfort Access Fob. And you can get cr2032 batterys for about 3 bucks each at a drug store or for less than a dollar on Ebay. There was a procedure somewhere on how to replace the rechargeable battery in the non ca keys . The bmwgm guy was saying the problem was seldom the battery though and even if the battery is flat the fob is suppose to start the car, if you put it in the fob slot. (for either a CA or non CA Fob) Suggest reading the manual doing a vin check for options at one of the free websites and verifing if you have comfort access or not. If you don't have a manual you can download one for free at bmwusa.com Also the old style blade that is in the keyfob needs to be in it for it to work for starting the car I believe. Very hard to be of any help without a accurate description that we can all understand in BMW terms. Last edited by ctuna; 12-22-2013 at 11:54 AM.. |
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12-22-2013, 01:28 PM | #21 |
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You CAN replace the battery in the non-Comfort Access key fob. You need to be willing to do some surgery though. I'll put up some pics if requested.
You'll need to cut along the seam around the perimeter of the FOB with a razor blade. Take your time. and be very careful not to penetrate too deep, you can easily damage the PCB inside. I actually knocked a capacitor off and scraped a couple of traces, but I was able to replace the cap (and the traces were not badly damaged). The battery is a Panasonic VL2020 with welded tabs which you will have to de-solder from the PCB. I found a similar battery at Digikey. http://www.digikey.com/product-detai...P081-ND/119936 I was not able to find the exact same pin configuration for the battery (haven't looked very hard yet), but I think that one could be made to work. So solder in the new battery and glue the housing with some black CA and you'll be good to go. http://www.amazon.com/IC-2000-Rubber...rubber+ca+glue I have not received my new battery yet but I did remove and re-install the old one just to be sure that it would still work and all is good Good luck! Last edited by Biz92; 12-22-2013 at 01:33 PM.. |
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12-22-2013, 08:13 PM | #22 | |
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