Horn goes off when I turn the wheel at all?

MonteCarbo · 08-01-2019, 11:53 AM

Greetings all,

I woke up to some frustrating issues with my 2003 Z4. I started the car as usual but found that whenever I did anything in the car, the horn would go off. If I moved the steering wheel at all, it would sound until I stopped moving the wheel. If I changed the gear, the horn would go off (I never drove it, just moved it to neutral). Clutch in, same thing. The issue was remarkably sensitive. Even lightly touching the wheel would make the horn go. I didn't do much more testing than this because, frankly, it was annoying and I didn't want to bother my neighbors.

I really hope someone on this forum may be able to help me. The little research I have done suggests that "the SIR COIL wire is shorting out to ground when turning the wheel" and likely needs the steering wheel pulled. The issue described in this research is similar but not nearly as sensitive as what I am experiencing. It may be different.

Thank you in advance for any help/advice you can offer!

Daemonblitz · 08-01-2019, 03:08 PM

Pop the airbag out first, it's pretty simple, lots of videos on Youtube and see if you spot any pinched/exposed wires. I expect that you will find something out of the ordinary there.

MonteCarbo · 08-01-2019, 03:37 PM

Quote:

Originally Posted by Daemonblitz

Pop the airbag out first, it's pretty simple, lots of videos on Youtube and see if you spot any pinched/exposed wires. I expect that you will find something out of the ordinary there.

Thank you for this. I posted the same question on another Z4 forum and received a similar suggestion, so this will definitely be my first course of action. The other guy said that it can often be a screw or piece of metal that gets stuck in such a way that it completes the circuit for the horn. Thank you again for the response. I will update this tomorrow when I pop the airbag off.

wdb · 08-02-2019, 10:22 AM

If you changed the gear the horn sounded? Do you have an alarm system?

Huz-Z · 08-02-2019, 02:23 PM

Wow! I was just in New York with the family for a holiday to see a couple of shows and it seems that everyone there has the exact same problem!!

Let’s hope the suggestions above get this fixed for you fast!

pungo · 08-03-2019, 04:49 PM

Just checking, is it the horn or the alarm siren going off?

08-01-2019, 11:53 AM	#1
MonteCarbo Registered 0 Rep 3 Posts Drives: 2003 BMW Z4, 2.5L Join Date: Sep 2018 Location: Texas iTrader: (0)	Horn goes off when I turn the wheel at all? Greetings all, I woke up to some frustrating issues with my 2003 Z4. I started the car as usual but found that whenever I did anything in the car, the horn would go off. If I moved the steering wheel at all, it would sound until I stopped moving the wheel. If I changed the gear, the horn would go off (I never drove it, just moved it to neutral). Clutch in, same thing. The issue was remarkably sensitive. Even lightly touching the wheel would make the horn go. I didn't do much more testing than this because, frankly, it was annoying and I didn't want to bother my neighbors. I really hope someone on this forum may be able to help me. The little research I have done suggests that "the SIR COIL wire is shorting out to ground when turning the wheel" and likely needs the steering wheel pulled. The issue described in this research is similar but not nearly as sensitive as what I am experiencing. It may be different. Thank you in advance for any help/advice you can offer!
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08-01-2019, 03:08 PM	#2
Daemonblitz Commander 221 Rep 850 Posts Drives: Z4MC/M5/640iX/M1000RR Join Date: Nov 2010 Location: Aurora, ON, Canada iTrader: (6) Garage List 2008 BMW M5 [9.50] 2006 Z4M Coupe [8.77] 2010 BMW S1000RR [10.00]	Pop the airbag out first, it's pretty simple, lots of videos on Youtube and see if you spot any pinched/exposed wires. I expect that you will find something out of the ordinary there. __________________ E86 ///M Coupe - Imola Red/Imola Red E60 ///M5 - (6 Speed) Silverstone Metallic/Black F06 640iX - Tanzanite Blue/Amaro Brown K66 ///M1000RR - Competition
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08-02-2019, 10:22 AM	#4
wdb dances with roads 4732 Rep 4,096 Posts Drives: '07 E86, '02 996, '95 Seven Join Date: Jul 2015 Location: the perimeter iTrader: (4)	If you changed the gear the horn sounded? Do you have an alarm system?
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08-02-2019, 02:23 PM	#5
Huz-Z Brigadier General 851 Rep 4,057 Posts Drives: Z4 3.0si, 328 XDrive, X5 35i Join Date: Aug 2009 Location: Canada iTrader: (0)	Wow! I was just in New York with the family for a holiday to see a couple of shows and it seems that everyone there has the exact same problem!! Let’s hope the suggestions above get this fixed for you fast!
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08-03-2019, 04:49 PM	#6
pungo Colonel 880 Rep 2,547 Posts Drives: Z4MC-X3-35i-525i, Corrado G60 Join Date: Nov 2007 Location: MD iTrader: (5) Garage List 2011 BMW X3 x35i [0.00] 2001 BMW 525i [0.00] 2007 BMW Z4 M Coupe [8.76]	Just checking, is it the horn or the alarm siren going off?
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