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E46 Convertible
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Old 05-09-2016, 03:35 PM   #1
xperia_man
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Join Date: May 2016
Location: Kent
Posts: 2
My Ride: E46 330CI
My Horn randomly goes off HELP !!!!

Hi everyone

Hope you are all well

I have my pride and joy a 2006 E46 330Ci in Estoril Blue, a BMW Individual model and the other night i was driving down a Bumpy road and all of a sudden the Horn went off. I proceeded to go home park up turn the engine off and leave the car over night, next day i turned the car back on and did and full turn both ways then horn went off again on both turns.I then took the car for a long drive tonight on the motorway and it was fine went over some bumpy roads fine on the way back home put the car into sport mode at some lights and voila its back the horn going off any ideas please help me out i know i am new


Thanks to all
Paul
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Old 05-10-2016, 01:49 AM   #2
Greg330CI
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Join Date: Nov 2010
Location: Australia
Posts: 128
My Ride: E46 330CIc
Hi Paul.
I have a 2004 E46 330 Cic Individual in Orient Blue, with Champagne Nappa Leather Interior. Great Car! I had the same problem with the horn as you describe. The problem was that a small screw had come loose with the steering wheel hub and was rolling around and occasionally made the horn contact. To fix it, you need to remove the airbag from the steering wheel. It is held in by 2 spring clips, one either side which you have to release. If you position the wheel centrally and look at the housing behind the wheel, you will see a hole on either side at about 9 o'clock and 3 o'clock. You need to get a long flat blade screwdriver that fits into the hole and then try to locate the spring clip and use the flat part of the blade to push it up. It is fiddly, but that will then release one side of the airbag. Do the same on the other side and yo can then carefully remove it. DO NOT disconnect the airbag connector unless you have previously disconnected the negative battery terminal otherwise you will get an airbag error warning light that you cannot reset without a (dealer) computer. Locate and replace the screw with a little loctite. Then replace the airbag. It just clips back in itself once you push it back evenly. Should do the trick. Good luck!
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Old 05-10-2016, 01:54 AM   #3
xperia_man
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Location: Kent
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My Ride: E46 330CI
Hi Greg

Thank you so much for your reply do I need to disconnect the battery negative terminal before attempting any of the work you have said ?

Thanks again
Paul
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Old 05-10-2016, 04:24 AM   #4
Greg330CI
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Join Date: Nov 2010
Location: Australia
Posts: 128
My Ride: E46 330CIc
Hi Paul. It is probably better to do that first, then you can disconnect the airbag and put it (carefully) aside to replace the screw. When you have reconnected and re fitted the airbag and re connected the battery, you may find that you have to cycle all the windows a few times to get them to reset the auto close features etc. On mine, I simply use each individual window switch to cycle up and down about 3 times then they all seem to reset OK. Good luck. I think there may be a separate write up with photos on removal of the airbag, may make it easier for you. If not on this forum, then try Bimmerfest forum. Good luck with it. Let me know if you solve it.
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Old 05-10-2016, 07:11 PM   #5
cityjohn
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Location: Los Angeles
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Quote:
Originally Posted by Greg330CI View Post
Hi Paul.
I have a 2004 E46 330 Cic Individual in Orient Blue, with Champagne Nappa Leather Interior. Great Car! I had the same problem with the horn as you describe. The problem was that a small screw had come loose with the steering wheel hub and was rolling around and occasionally made the horn contact. To fix it, you need to remove the airbag from the steering wheel. It is held in by 2 spring clips, one either side which you have to release. If you position the wheel centrally and look at the housing behind the wheel, you will see a hole on either side at about 9 o'clock and 3 o'clock. You need to get a long flat blade screwdriver that fits into the hole and then try to locate the spring clip and use the flat part of the blade to push it up. It is fiddly, but that will then release one side of the airbag. Do the same on the other side and yo can then carefully remove it. DO NOT disconnect the airbag connector unless you have previously disconnected the negative battery terminal otherwise you will get an airbag error warning light that you cannot reset without a (dealer) computer. Locate and replace the screw with a little loctite. Then replace the airbag. It just clips back in itself once you push it back evenly. Should do the trick. Good luck!
That describes EXACTLY what happened to me and what I did to fix it. The mystery was a) why the car was built with an extra screw in the first place and b) why it took years for a loose screw to become a problem (where was it the whole time before?!)
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Old 05-11-2016, 06:01 PM   #6
Greg330CI
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My Ride: E46 330CIc
In my case, the screw had come out from where it was originally screwed into. To be honest, I cannot recall exactly where from but it was obvious at the time with the airbag removed. The fact that it had come loose did not seem to cause any other problem, other than the horn going off randomly when the wheel was turned.
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