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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 07-24-2013, 05:52 PM   #1
elbee
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Key Fob not locking/unlocking - actuator or GM5?

So, I had this issue once with my dad's e39. The key fob would not lock/unlock the doors. It was a fairly easy repair. I did it awhile ago so I don't remember the specifics, but the repair was done in the trunk.

The same issue is coming up on our e46 and based on the searching I've done, it's not as straightforward. It looks like it can be a problem with the actuator or the GM5 module. Both look like fairly involved DIY's. Is there a test I can do to determine which part might be the issue? I'm hoping to avoid an unnecessary DIY.

Thanks!
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Old 07-24-2013, 06:01 PM   #2
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Old 07-24-2013, 06:16 PM   #3
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Thank you!
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Old 07-24-2013, 06:16 PM   #4
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Scott may chime in soon?

I think a few questions would be:

1. Is the problem only with a single door?
2. Do the interior lights come on, but the door not unlock?
3. Do you have the problem also unlocking the car using the central locking button?
4. How intermittent is the problem and does it appear to be heat related?
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Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299

Last edited by jfoj; 07-24-2013 at 06:18 PM.
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Old 07-24-2013, 07:30 PM   #5
SC4R27
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Quote:
Originally Posted by jfoj View Post
Scott may chime in soon?

I think a few questions would be:

1. Is the problem only with a single door?
2. Do the interior lights come on, but the door not unlock?
3. Do you have the problem also unlocking the car using the central locking button?
4. How intermittent is the problem and does it appear to be heat related?
my key just stopped working on all doors and trunk. the interior lights also do not turn on. Sometimes if i shake the key (i do not hear anything inside) and then press unlock it will work. I think its broken from being dropped. Should i get a new key?
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Old 07-24-2013, 07:32 PM   #6
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does the central lock button work if say you try to get in and the windows are down.
does it seem to do it more in the hot day rather than the cool night?
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Old 07-24-2013, 07:42 PM   #7
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No they don't and the temperature does not change the outcome. I was hoping all it needs is a new battery
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Old 07-24-2013, 07:54 PM   #8
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yeah, doesnt sound like the GM5
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Old 07-24-2013, 08:17 PM   #9
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Quote:
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Scott may chime in soon?
CHIME!

Quote:
Originally Posted by SC4R27 View Post
my key just stopped working on all doors and trunk. the interior lights also do not turn on. Sometimes if i shake the key (i do not hear anything inside) and then press unlock it will work. I think its broken from being dropped. Should i get a new key?
Bad key. Get it repaired or buy a new one. It's up to you.

Quote:
Originally Posted by elbee View Post
So, I had this issue once with my dad's e39. The key fob would not lock/unlock the doors. It was a fairly easy repair. I did it awhile ago so I don't remember the specifics, but the repair was done in the trunk.

The same issue is coming up on our e46 and based on the searching I've done, it's not as straightforward. It looks like it can be a problem with the actuator or the GM5 module. Both look like fairly involved DIY's. Is there a test I can do to determine which part might be the issue? I'm hoping to avoid an unnecessary DIY.
So the SAME issue is happening with your E46 which from what you wrote about the E39 problem I see that you are having issues "The key fob would not lock/unlock the doors." This is not a GM5 or actuator problem. Sounds more like a key fob, key sync or FZV antenna amplifier problem.

Last edited by scottjoh; 07-24-2013 at 08:24 PM.
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Old 07-24-2013, 08:27 PM   #10
jfoj
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Make sure you call around to the dealers and ask for the key by part number.

Master key/keyfob part number - 66126955750 (BMW list price is showing $166.29 last I checked, some dealers will sell for as low as $124.72).
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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Old 02-08-2014, 04:06 PM   #11
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Quote:
Originally Posted by jfoj View Post
Scott may chime in soon?

I think a few questions would be:

1. Is the problem only with a single door?
2. Do the interior lights come on, but the door not unlock?
3. Do you have the problem also unlocking the car using the central locking button?
4. How intermittent is the problem and does it appear to be heat related?
Hi buddy I have these problems not key fob as have tried two what is your suggestion if answers to above questions are yes?
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