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Thread: Advice needed - replacing alarm siren unit

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  1. Question Advice needed - replacing alarm siren unit 
    #1
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    Hi folks,

    In a nutshell; please can somebody tell me the exact location of the alarm siren on the A6 C6 Avant?


    My A6 normally chirps when I lock it; this stopped happening a few weeks back.

    Earlier this week when I was having new tyres fitted; the car alarm was activated... flashing hazard lights all round but total silence - I presume the alarm siren unit has failed.


    I've read the most common cause of the alarm siren failing is the battery backup cells leaking / corroding the circuit board. I bought a 2nd hand replacement from eBay for 10.
    I intend to do this mod to ensure the battery will be good for a few years: Audi A4/B6 Alarm Siren - Replace NiMH Batteries | Audi-Sport.net

    I watched this Russian vid showing where the alarm siren is and how to remove it:
    ✅ Audi A6 C6 Alarm Horn repair video. 🚘 *емонт Штатной Сигнализации H12 ⚒ КАК СНЯТЬ СИ*ЕНУ - YouTube

    The problem is; it all looks totally different in my scuttle panel, being a RHD. I can't see the alarm unit anywhere! Can anybody advise where it is please / what I need to remove to get to it?

    Thanks in advance
    Al
    [ My Cars: 2012 A4 SE 2.0 TFSI Quattro Avant | 2009 TT 2.0 TFSI Roadster ]
    [ Past Audis:
    A6 S-Line 3.0 V6 TDI Qttr | A4 3.0 TDI Qttr S-Line | S6 4.2 Qttr | A4 2.5 V6 TDI Qttr Sport | A4 1.9 TDI Qttr S-Line ]
    [ Past Golfs: Mk1 GTI Cab | Mk3 2.0 Cab | Mk3 VR6 | Mk4 R
    32 | Mk4 V6 MoFo | Mk4 Golf 1.9 TDI| Mk4 Supercharged 2.0 6-speed
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  2. Re: Advice needed - replacing alarm siren unit 
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    Mario doesn't know where it goes either!20180623_161859.jpg20180623_161928.jpg

    Sent from my SM-G950F using Tapatalk
    [ My Cars: 2012 A4 SE 2.0 TFSI Quattro Avant | 2009 TT 2.0 TFSI Roadster ]
    [ Past Audis:
    A6 S-Line 3.0 V6 TDI Qttr | A4 3.0 TDI Qttr S-Line | S6 4.2 Qttr | A4 2.5 V6 TDI Qttr Sport | A4 1.9 TDI Qttr S-Line ]
    [ Past Golfs: Mk1 GTI Cab | Mk3 2.0 Cab | Mk3 VR6 | Mk4 R
    32 | Mk4 V6 MoFo | Mk4 Golf 1.9 TDI| Mk4 Supercharged 2.0 6-speed
    | Wife Wagon: VW Touran 2.0 TDI DSG ]
     
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  3. Re: Advice needed - replacing alarm siren unit 
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    I found mine in the front left of the rain tray, tucked under the windscreen. It's right in the corner, behind the black plastic box that contains the ECU. Not sure if yours will be in the same location. Mine's a 2006 Avant.
    To take it out I took the top cover off the box to aid access, but I can't remember if it was doable without removing the lid. Clean all leaves and dirt in the area before opening the box lid.
    2006 A6 Avant 3.0 TDi Quattro
     
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  4. Re: Advice needed - replacing alarm siren unit 
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    Thanks kindly, I appreciate your reply.

    So it's in under the far corner of the screen on the passenger's side? (assuming South Africa is RHD too?)

    Did you have to take off the plastic panel that goes under the windscreen wipers, or just the main scuttle panel?

    Cheers
    Toff
    [ My Cars: 2012 A4 SE 2.0 TFSI Quattro Avant | 2009 TT 2.0 TFSI Roadster ]
    [ Past Audis:
    A6 S-Line 3.0 V6 TDI Qttr | A4 3.0 TDI Qttr S-Line | S6 4.2 Qttr | A4 2.5 V6 TDI Qttr Sport | A4 1.9 TDI Qttr S-Line ]
    [ Past Golfs: Mk1 GTI Cab | Mk3 2.0 Cab | Mk3 VR6 | Mk4 R
    32 | Mk4 V6 MoFo | Mk4 Golf 1.9 TDI| Mk4 Supercharged 2.0 6-speed
    | Wife Wagon: VW Touran 2.0 TDI DSG ]
     
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  5. Re: Advice needed - replacing alarm siren unit 
    #5
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    Yes exactly, we're RHD too.

    I do believe I had to take the panel under the wipers too, but you can just check access first. Certainly it will be easier if you take that panel off, but then it's wipers off too and that annoying lip which lips into the base of the windscreen support. It's only held in by one M8 nut if I remember correctly.

    Regards
    Mark
    2006 A6 Avant 3.0 TDi Quattro
     
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  6. Re: Advice needed - replacing alarm siren unit 
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    Thanks kindly. I hate taking the wipers off... last time I did that, I cracked my windscreen.... but I do have three legged pullers this time!

    I will post up photos of the job

    Toff
    [ My Cars: 2012 A4 SE 2.0 TFSI Quattro Avant | 2009 TT 2.0 TFSI Roadster ]
    [ Past Audis:
    A6 S-Line 3.0 V6 TDI Qttr | A4 3.0 TDI Qttr S-Line | S6 4.2 Qttr | A4 2.5 V6 TDI Qttr Sport | A4 1.9 TDI Qttr S-Line ]
    [ Past Golfs: Mk1 GTI Cab | Mk3 2.0 Cab | Mk3 VR6 | Mk4 R
    32 | Mk4 V6 MoFo | Mk4 Golf 1.9 TDI| Mk4 Supercharged 2.0 6-speed
    | Wife Wagon: VW Touran 2.0 TDI DSG ]
     
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  7. Re: Advice needed - replacing alarm siren unit 
    #7
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    Hey Toff, How'd you get on?

    Mark
    2006 A6 Avant 3.0 TDi Quattro
     
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  8. Re: Advice needed - replacing alarm siren unit 
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    Hi,

    Sadly work / family commitments have denied me any spanner time

    I'll hopefully sort it in the next few weeks...

    Al
    [ My Cars: 2012 A4 SE 2.0 TFSI Quattro Avant | 2009 TT 2.0 TFSI Roadster ]
    [ Past Audis:
    A6 S-Line 3.0 V6 TDI Qttr | A4 3.0 TDI Qttr S-Line | S6 4.2 Qttr | A4 2.5 V6 TDI Qttr Sport | A4 1.9 TDI Qttr S-Line ]
    [ Past Golfs: Mk1 GTI Cab | Mk3 2.0 Cab | Mk3 VR6 | Mk4 R
    32 | Mk4 V6 MoFo | Mk4 Golf 1.9 TDI| Mk4 Supercharged 2.0 6-speed
    | Wife Wagon: VW Touran 2.0 TDI DSG ]
     
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