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Problem with E91(Touring) Radio Aerial

BMW forum 3 series car: E21, E30, E36, E46, E90, E91, E92, E93, F30, F31, F34, F35

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Problem with E91(Touring) Radio Aerial

Postby nicko31 » Sun, 13 Feb 2011 15:50:27 UTC

About 2 years ago my 2006 my 320dSE developed a problem with the radio antenna. FM signal became weak and AM non-existent. As the car had only just turned 3 year I took it to the main dealer in the expectation they might cover the cost of repair. Issue was diagnosed was the rear window which was replaced (50% contribution from BMW). Recently the problem happened again, I took it back on the expectation it might be the same issue again only to be told this time it was an issue with the antenna amplifier. Anyway they replaced it without my consent and tried to charge me, I told them to reverse the work done. Anyway, does anyone know where the antenna amplifier is located and how to replace, also are all E91 amplifiers the same?
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Re: Problem with E91(Touring) Radio Aerial

Postby freefall_junkie » Mon, 14 Feb 2011 17:18:03 UTC

The amplifier is located in the tailgate spoiler on the E91 and is prone to damage from water ingress. You may find this useful viewtopic.php?f=4&t=93637 It does the job for the remote locking as well as the radio. I ended up replacing mine. A reasonably easy diy job and I think the part was about £110 from BMW.

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Re: Problem with E91(Touring) Radio Aerial

Postby jshires » Wed, 13 Apr 2011 08:21:55 UTC

Mark. My 2006 E91 has developed the same issue with the radio and, recently both remote key fobs have stopped operating the central locking (which is otherwise working perfectly). All symptoms point to the receiver amplifier which I am told does both radio and remotes. Would it be possible to explain how to access this module (photos would be great if you have them) as it doesn't seem straight forward on first viewing the tailgate? Also is it necessary to recode this module to the key fobs or is this just an analogue amplifier box? Thanks
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Re: Problem with E91(Touring) Radio Aerial

Postby freefall_junkie » Wed, 13 Apr 2011 11:43:19 UTC

Don't have any photos I'm afraid, but if you look in the thread link above there is a good description of how to get at the amplifier by removing the tailgate spoiler - it is pretty straightforward.

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Re: Problem with E91(Touring) Radio Aerial

Postby freefall_junkie » Wed, 13 Apr 2011 11:44:33 UTC

Oh, and no recoding required - just plug the new amplifier in and away you go.
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Re: Problem with E91(Touring) Radio Aerial

Postby jshires » Wed, 13 Apr 2011 21:39:42 UTC

Thanks Mark will check out. Do you know if the same amplifier is used for the radio?
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Re: Problem with E91(Touring) Radio Aerial

Postby freefall_junkie » Thu, 14 Apr 2011 15:43:35 UTC

It is all one unit, item 1 in this diagram http://www.realoem.com/bmw/showparts.do ... g=65&fg=30

Incidentally I have heard of BMW dealers charging £400 to diagnose the problem and replace the part :shock: When I replaced mine I put loads of extra sealant gunk round the unit to prevent water ingress which is the source of the problem.

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Re: Problem with E91(Touring) Radio Aerial

Postby jshires » Thu, 14 Apr 2011 21:21:53 UTC

Mark
This is excellent info. I have a replacement receiver on order
and will get some butyl strip if needs be or is silicone sealant
easier and as good?
Unfortunately I won't be able to fix this until Easter - do you
know if is possible to defeat the alarm by pulling a fuse and
if so which one?
Also did you find that you needed to replace the rubber seals over
The spoiler fixing points after removing them as look easy to
Damage when you remove them?
Thanks.
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Re: Problem with E91(Touring) Radio Aerial

Postby freefall_junkie » Fri, 15 Apr 2011 11:22:16 UTC

I didn't figure out how to defeat the alarm I'm afraid. Silicon sealant seems to have done a good job on mine - i put loads round the join in the amplifier housing box and it doesn't have to be a neat job as of course it is invisible. The rubber grommets over the spoiler fixing bolts are pretty easy to prise out without damage - no need to replace them.

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Re: Problem with E91(Touring) Radio Aerial

Postby jshires » Thu, 21 Apr 2011 13:55:52 UTC

Thanks Mark. Hope to get this job done this weekend.
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Re: Problem with E91(Touring) Radio Aerial

Postby jshires » Thu, 28 Apr 2011 21:38:38 UTC

Taken a look at the receiver module and this is ok. Local dealer
run diagnostics to confirm my suspicions that the issue is due to
faults in the drivers side wiring harness. Have quoted me £500 inc
To install a loom repair kit part number 61119133630
Local dealer has quoted £114+vat for this part so the rest is their
Labour charge. Do you know if this a big job or not - they have told
Me it is essentially spliced into existing wiring and once fitted will
Replace th section of loom around the hinge.
Other optiOn is another indePendent who has done a loom repair
recently for another customer at cost of £102. Guess this option
Would just address those broken wires lea ing open the
possibility that other cables j. The loom may be clOse to breaking.
Will discuss options for repairing my car with this company.
Any comments would be appreciated. Thanks Jonathan.
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Re: Problem with E91(Touring) Radio Aerial

Postby jshires » Wed, 11 May 2011 18:03:17 UTC

Have today taken to an indy specialist who has seen this problem and fixed wiring on quite a lot of 3 and 5 series cars. So far they have fixed the remote and radio reception problems for all in cost of £82...but, the drivers door lock motor has been diagnosed as faulty now - will check out the fuse first as this will otherwise cost me a further £132 for a new replacement.
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Re: Problem with E91(Touring) Radio Aerial

Postby Mat4 » Sun, 24 Jul 2011 15:45:17 UTC

Hi did you ever sort this problem out as I have similar problem with my tourer, as both remotes stopped working and took reciever out but looks fine so thinking it could be the loom (which loom was it??) did you have any other symptoms?? I had recent problem with the locking with fuse 57 going which I did fix of 20amo fuse for 15amp which had blown then all seemed well before had massive battery drain one day. Juped car and fine, then about a week later had the remote fobs go on me!!
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Re: Problem with E91(Touring) Radio Aerial

Postby FTEM » Fri, 14 Sep 2012 06:42:52 UTC

Since the diversity amplifier (component A421) needs 12 V power, I want to check if the fuse is still OK.
Question is: which fuse is it ?
The symbols used in the overview paper are probably not straightforward pointing to A421.
I will look into it today.
It would be nice to receive useful info.

To be continued...
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Re: Problem with E91(Touring) Radio Aerial

Postby FTEM » Fri, 14 Sep 2012 10:48:48 UTC

...continued.
I've checked out fuses 5 and 19 listed after a radiating dot symbol, fuse 28 listed after a radiating P symbol, fuses 2, 23 and 31 listed after a radio symbol, as well as all 5 Amp fuses; all fuses are OK ...
Still open for idea's; next move would be to the BMW service point.
I've ordered the new 320d Touring 2012, and I will pass on my actual 2006 Tourer to one of my sons.
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Re: Problem with E91(Touring) Radio Aerial

Postby ck2500 » Thu, 14 Mar 2013 16:37:14 UTC

Hi all,

Sorry to jump on someone else's thread.

I've just been advised my E91 has the same fault and that the BMW dealer warranty doesn't cover water ingress.

Looking at a £500 bill now, so not a good start to my BMW ownership.

Surely the warranty should cover it as it is clearly a design fault. The sales team made no mention that I was buying a fair weather model!
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