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  #11  
Old 07-20-2006, 04:30 PM
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It happened twice to me last year, about 2 months apart. However it hasn't happened since, and I don't even wanna bother asking the dealer.
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  #12  
Old 07-20-2006, 06:57 PM
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If we're talking the interior dash lights, it never happened in my '04 X3 and has yet to happen in my '06 X3, but it happened several times in my '05 325i . . . a few times I thought my mind or reflcetions were playing tricks on me. It goes out and then suddenly comes back on before I have a chance to do anything about it. Still, it has never happened to me at night - just when it was dark enough to have the lights come on but not enough to need them to see (I always leave the switch in the automatic position). One more thing, my '04 X3 and my '05 325i are not the Xenons - I don't know if that has anything to do with it or not.
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  #13  
Old 07-21-2006, 09:44 AM
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If it is all background lit lights like gauges, led displays in the bottom etc. it might be the automatic gauge brightness control. I noticed my E46 seemed to change these sometimes rapidly and without a reason but haven't yet in my X3. I think it even adjusted the business radio display at the same time.

In the light switch unit there is that small clear / greyish dot (photo cell?) that is measuring the amount of light. If you cover that during daytime with your finger you can see the brightness starts to change slowly. You might need to have your lights turned on or in automatic mode, not sure. If they are manually turned off I think this feature is disabled and brightness can be only adjusted manually using the roll knob. This could be playing tricks.

For example on a bright sunny day if you drive under a birdge or something like that you can see it adjust them and when you come out there it may take a while to adjust them again. Usually it is stepless but sometimes jumps from bright to dim and back. Now it could also happen if you lean on your left elbow towards the door and your hand creates a shade on top of the measurement unit.

If you loose some other lights like high beam or warning lights that is a different story.

- p
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  #14  
Old 07-21-2006, 09:47 AM
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Quote:
Originally Posted by phuksi
If it is all background lit lights like gauges, led displays in the bottom etc. it might be the automatic gauge brightness control......- p


I have never heard of this before and I don't think I have this sensor in my X3.

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  #15  
Old 07-21-2006, 10:20 AM
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Phuksi-

I think what we're talking about, is ALL the interior lighting goes blank for a period of time, not the auto-dimming the pixel displays do when you go into a tunnel or whatever. Literally, everything goes out, the gear display goes blank, etc at a random time.
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  #16  
Old 07-21-2006, 04:15 PM
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I wondered the same thing first time last weekend. I tried to adjust the brighthness from the knob, but nothing.. Then after about 15 seconds dash-lights came back.

Also one other thing that wonders me is the navi-monitor. Sometimes it stucks at the middle, sometimes it does not go up at all. Sometimes I have to force it open... I told this problem in last service, and they said that there was some firmware problem and its fixed now.. but no. Anyone else having this?
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  #17  
Old 07-24-2006, 06:36 AM
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This just happened to me this weekend. I looked down to see the temp and there was nothing there. Then it came back on and is fine.
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  #18  
Old 08-03-2006, 10:05 PM
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This just happened to me yesterday. I *may* mention this to the service rep next visit for Inspection I (along with a grocery list of other items I'm picky on). Just 2300mi to go........
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  #19  
Old 08-12-2006, 10:12 AM
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Followup:

I took the X3 in for first scheduled maintanence and asked them to check the instrument cluster lights, squeeky brakes, creaky door, and wanted them to program the X3 so doors lock automatically when first taking off.

So I leave the SAV there all day and pick it up in the evening. They told me they think the dimmer switch is faulty; causing havoc with the electrical because they could NOT get the car to program the automatic lock code.

Can a faulty dimmer switch cause the instrument cluster lights to go out periodically, and prevent them from programming the auto lock code??!!

They are ordering a new dimmer switch and door seal.

Out of curiosity - I turned the lights on and checked the dimmer switch out when I drove home. The dimmer switch works fine
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  #20  
Old 12-19-2007, 05:41 PM
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Resurrecting this old thread to help anyone that may be still experiencing this.

There is a service bulletin out for this issue, covered under warranty. Here is the pertinent info:

SI B 62 10 06 Instruments
February 2007
Technical Service


SUBJECT
Instrument Cluster Back Lighting Fails Sporadically

MODEL
E46 (3 Series)

E83 (X3)
E85 (Z4)
Vehicles produced from August 31, 2003 to July 27, 2006.
SITUATION
The customer may experience brief failure of the instrument cluster back lighting, air condition control or radio. The failure will last between 10-15 seconds.

CAUSE
Light Switching Center (LSZ)

CORRECTION
Replace the LSZ with updated parts as listed below. Please compare with EPC before carrying out the replacement.
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