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E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

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  #1  
Old 07-20-2012, 09:13 PM
manoweb manoweb is offline
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Location: Redwood City, California, USA
 
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Posts: 35
Mein Auto: Z4
Z4 How to disable seat-belt chime

Hi, the seat belt chime in the Z4 is one of the most irritating I've ever heard.



It is one of those things that made me reluctant to drive this beautiful car so today I decided the Z4 needed some surgery:

We need to remove this T20 (Torx) screw
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I used a right-angle scredriver that I got for cheap at Harbor Freight
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Slide out the instrumentation panel by pulling left and right
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Removind the harness requires some attention but it's easy once you understand how to proceed
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Now go on a bench and use a T8 (Torx) bit to remove the back cover of the instrumentation block
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Use a flat screwdriver to unlock the tabs (5 total)
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The PCB is now exposed. Honestly it's of very good quality, I'm impressed
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That little speaker is responsible for the annoying chime; we shall get rid of it
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I used a solder iron to melt the tin and remove the unwanted component once and for all
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Finally, clean job
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Reassemble everything and live happy today is one happy day!

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  #2  
Old 07-21-2012, 03:50 AM
tonywintn tonywintn is offline
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Location: Tennessee
 
Join Date: Jun 2009
Posts: 187
Mein Auto: 2005 BMW X5 & 2007 Z4 si
I think the single most reliable and durable component in a car is that awful beeper.
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  #3  
Old 07-21-2012, 04:36 AM
Droptop85 Droptop85 is offline
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Location: Fresno
 
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Posts: 351
Mein Auto: 03 Z4 3.0i
I was wondering how to do this myself. Couldn't you just ground out the seat belt lock? That way it thinks it's always buckeled. Haven't tried it myself but I might in the next few days.
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  #4  
Old 07-21-2012, 04:37 AM
Droptop85 Droptop85 is offline
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But good write up. If the ground doesn't work ill definitely try this. Thank you
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  #5  
Old 07-21-2012, 05:27 AM
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BeemerMikeTX BeemerMikeTX is offline
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Location: League City, TX and Santiago, Chile
 
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Mein Auto: Z3 3.0i Roadster, K1300S
All that work just so you can drive your sports car without buckling your seat belt?
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Mike White
"That's right, you're not from Texas, but Texas wants you anyway." -LL
2001 Z3 3.0i Roadster (Topaz Blue Metallic, 5-speed manual, Sport Package, CD radio, heated seats and mirrors, non-power top via special order)
"Beemer" is for my BMW motorcycles - '13 K1300S, '95 R1100RS, '88 K75S, '75 R90S (gone, but not forgotten).
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  #6  
Old 07-21-2012, 05:41 AM
chickdr chickdr is offline
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Quote:
Originally Posted by BeemerMikeTX View Post
All that work just so you can drive your sports car without buckling your seat belt?
It beeps at you for other things too(like when you put the key in the ignition). I doubt it is seat belt avoidance he is looking for(although he may chime in and prove me wrong). It is a pretty annoying beeper. I remember another post which did not remove the beeper, but instead put electrical tape over it to quiet it down a notch.
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  #7  
Old 07-21-2012, 07:07 AM
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BeemerMikeTX BeemerMikeTX is offline
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Location: League City, TX and Santiago, Chile
 
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Mein Auto: Z3 3.0i Roadster, K1300S
Quote:
Originally Posted by chickdr View Post
It beeps at you for other things too(like when you put the key in the ignition).
My Z3 seat belt chime only sounds if I get in the car, put the key in the ignition, and then start the car before I fasten the seat belt. It does not sound if I just put the key in the ignition before I fasten the seat belt. Does the Z4 work differently?
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Mike White
"That's right, you're not from Texas, but Texas wants you anyway." -LL
2001 Z3 3.0i Roadster (Topaz Blue Metallic, 5-speed manual, Sport Package, CD radio, heated seats and mirrors, non-power top via special order)
"Beemer" is for my BMW motorcycles - '13 K1300S, '95 R1100RS, '88 K75S, '75 R90S (gone, but not forgotten).
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  #8  
Old 07-21-2012, 07:46 AM
manoweb manoweb is offline
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Location: Redwood City, California, USA
 
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Mein Auto: Z4
Quote:
Originally Posted by Droptop85 View Post
I was wondering how to do this myself. Couldn't you just ground out the seat belt lock?
Well I don't know but I do not know how easy is to ground it. And the chimes are not limited to the seatbelt like chickdr mentioned.
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  #9  
Old 07-21-2012, 08:02 AM
manoweb manoweb is offline
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Location: Redwood City, California, USA
 
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Mein Auto: Z4
Quote:
Originally Posted by BeemerMikeTX View Post
All that work just so you can drive your sports car without buckling your seat belt?
My post was about mechanism, not policy. If you want to remove the speaker, those are the instructions, I do not enter in the details about why people wants to do it.


But, because you asked: my Z4 would beep at least in the following circumstances:
- you turn the key in the "ON" position so you can operate the top and the electric windows. Even without starting the engine, it chimes several times.
- it chimes endlessly if you put the key in the OFF position and the driver's door is opened.

None of the above situations includes driving without the seat-belt. Now, I exit home at 5:05 in the morning and I commute with my little infant in his car seat; while driving, the vibrations and the road noise actually help to keep him asleep; but beeps and harsh sounds can awake him immediately. The chime was forcing me to very complicated maneuvers when I get out of the garage, I fix the top, I load the kid, I stop at the gas station, I get to the office, I unload everything, etc. Without the speaker everything is going to be much easier now
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  #10  
Old 07-21-2012, 09:02 AM
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BeemerMikeTX BeemerMikeTX is offline
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Location: League City, TX and Santiago, Chile
 
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Mein Auto: Z3 3.0i Roadster, K1300S
Quote:
Originally Posted by manoweb View Post
But, because you asked: my Z4 would beep at least in the following circumstances:
- you turn the key in the "ON" position so you can operate the top and the electric windows. Even without starting the engine, it chimes several times.
- it chimes endlessly if you put the key in the OFF position and the driver's door is opened.
OK, you've got reasons other than driving without the seat belt fastened for disabling the warning chime. If these reason are applicable to others, and are worth the work to disassemble the dash and risk damaging the instrument cluster desoldering the speaker, then your procedure is probably pretty helpful.
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Mike White
"That's right, you're not from Texas, but Texas wants you anyway." -LL
2001 Z3 3.0i Roadster (Topaz Blue Metallic, 5-speed manual, Sport Package, CD radio, heated seats and mirrors, non-power top via special order)
"Beemer" is for my BMW motorcycles - '13 K1300S, '95 R1100RS, '88 K75S, '75 R90S (gone, but not forgotten).
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  #11  
Old 07-21-2012, 12:32 PM
Droptop85 Droptop85 is offline
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Location: Fresno
 
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Mein Auto: 03 Z4 3.0i
Reason number 64: the 03 z4 has a software fault which causes the beeper to never shut up until you pull the negative battery terminal off. (my car!)
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  #12  
Old 03-30-2013, 06:03 AM
NHREDZ4 NHREDZ4 is offline
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Location: Barrington, NH
 
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Mein Auto: Z4 roadster
Gone and hopefully forgotten!
Thank you!
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  #13  
Old 03-30-2013, 06:15 AM
Jstic Jstic is offline
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Location: CT
 
Join Date: Mar 2013
Posts: 91
Mein Auto: 2006 Z4 3.0i
That warning can be turned off with software, no need to take apart the instrument cluster. Also, that speaker is there for several other audible warnings, not just the seatbelt.
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  #14  
Old 03-30-2013, 09:35 AM
Psygnosis Psygnosis is offline
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Location: WA
 
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Posts: 253
Mein Auto: 2004 Z4 3.0i Sport
Wow, that got really annoying post facelift, I'm pretty sure my 2004 doesn't beep that much.
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  #15  
Old 04-04-2013, 10:39 AM
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Cvaria Cvaria is offline
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Location: Tallahassee, Florida
 
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Posts: 376
Mein Auto: 2003 Z4 ; 2002 Wrangler;
coding

Just have a coder disable it.



or get a cable and do it yourself, don't tear up your car.

i turned mine off. i'll post a video and the line of code later.
************************************************** **update**********



**sorry about the angle

SBR_BEIFAHRER_SGM (passenger seat)
--> nicht_aktiv (set to this)
--> aktiv (original value)

SBR_FAHRER_SGM (driver seat)
--> nicht_aktiv (set to this)
--> aktiv (original value)
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Last edited by Cvaria; 04-05-2013 at 05:53 AM.
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