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      02-05-2016, 08:37 PM   #1
Stewy_604
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Comfort access not working

Hey Guys,

The CA has stopped working on our E82, but the fob still functions using the buttons for lock/unlock/trunk. The car still runs with the fob inserted into the dash.

Here's what I've tried, all with no avail.
-new battery in keyfob
-open door using manual key, key in dash, start car, stop engine, lock doors with keyfob

I'll check the CA module in the trunk to see if it's gotta wet, etc... And I also read to check the fuses in glove...any other ideas? I can try our other key when the Mrs. gets home tonight as well. Thanks guys.
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      02-05-2016, 11:35 PM   #2
zx10guy
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My comfort access module had to be replaced when my car wouldn't start without inserting the key into the dash. I didn't know comfort access was not working since it was shortly after buying my car and the fact my other cars never had a feature like it. So I was just used to using the FOB to lock/unlock and old school starting my car. I don't know if locking or unlocking the doors was affected by the comfort access module failure.

My dealer brought it up to my attention when I had my car in for service.
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      02-06-2016, 05:18 PM   #3
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Check the module in the trunk.

The taillight assembly tends to leak, and water sits in the foam box in the trunk holding the module.

The geniuses at BMW put the part line of the module box on the bottom, so only a 1/2" of water means water gets in. Over time, the board fries.

Mine stopped working last month. Pulled the module from the trunk, opened the cover...even before I did...you could smell it was fried.

$80 replacement on ebay and back working again.
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      02-09-2016, 12:20 PM   #4
Stewy_604
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^^ I did some troubleshooting on the weekend, and the module is indeed fried due to water. Could smell it right away when I pulled up the carpet/trunk liner.
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      02-09-2016, 04:01 PM   #5
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Updates...sunroof drains are to blame. New module on order from BMW.

Last edited by Stewy_604; 02-10-2016 at 06:01 PM.
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      02-10-2016, 12:36 PM   #6
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Can you post a pic of where the board is? Mine seems to be intermittent so I would like to make sure everything is plugged in correctly.
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      02-10-2016, 06:00 PM   #7
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Quote:
Originally Posted by onefastsvt View Post
Can you post a pic of where the board is? Mine seems to be intermittent so I would like to make sure everything is plugged in correctly.
The module is located in the trunk, passenger side well behind the rear tire under the carpeting. It sits in a black Styrofoam "holder" that is form fitted to the well. If your problem is intermittent, it's probably antenna or fob related I would think.
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      Yesterday, 05:27 PM   #8
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Updates...new module installed. Although the CA is still not working properly. Once I plug the key in, and remove it and the starting feature works. Once I open the door then all is disabled... No error codes. Any ideas guys?
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