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      09-06-2020, 12:03 PM   #1
eli371
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Electrical Woes? - No Audio...sometimes

2010 Z4 35i

So I'm useless when it comes to electronics, so hoping for some insight.
From what I know, the car chimes 3 times on start up, here's the "symptoms"

When starting the car:
1) 95% of the time, i get nothing. No audio, no chimes, no radio, no gps voice. Nothing.
2) Other 5% of the time, it's either
- audio kicks in on the last chime, radio kicks in shortly after
- music/audio will kick in after starting to drive (1-2 minutes usually, scares the crap out of me if i forget to lower the volume)
- the audio works as intended. I'll hear all 3 chimes.

***I've never had the audio cut out while driving if it's working***
- the symptoms seem completely random, if i get lucky and have it working, generally doesn't work if i turn the car off/on again.

Fuses tested ok.
Next plan was to tear apart the trunk looking for the amp. Any suggestions?

Last edited by eli371; 09-07-2020 at 12:18 AM..
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      09-07-2020, 08:44 PM   #2
Eltee
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Batteries that are near the end of their life can do really strange things with electrical components.

Just a thought in case your battery is getting old.
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      09-08-2020, 12:39 PM   #3
eli371
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I'll test it but replaced and registered new battery to the car last year.
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      09-09-2020, 02:42 AM   #4
tintoverano
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battery charge level is not always at the top, even with not so old batteries - highly depends on using the car

with age batteries lose their capability to hold the charge for long, but it is not case for you
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      10-25-2020, 11:28 AM   #5
eli371
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Quick update - after having no audio for 2 months straight, it's been about 5 days now with the audio working no issues.

I have no idea what this could be.
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      10-26-2020, 01:15 PM   #6
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likely bad amp
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      11-24-2020, 11:45 AM   #7
57type1
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Same issue here. done some research and it seems the amp is the problem. A while back I found a place that you can send it in, tested and upgraded. But I misplaced that info. When I find it I will post.
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      12-10-2020, 05:25 PM   #8
eli371
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Thanks, that'd be helpful. I'm not even entirely sure where the amp is located.
On a side note, my audio has been working every time for the last month.
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