Three beeps from rear of 1.8T Sport.

[xmay4444]

Hi guys, I have noticed that my A4 once in a while emits three beeps from the rear of the car, (was even louder with the boot open), just after starting. The car is fine but i'm just curious and hope it is not a prelude to some problem.
Any insights into this will be greatly appreciated.

[a8 tech]

The battery backup batteries in the alarm siren are failing.Audi dont supply spare batteries,only the siren but you can replace them if you strip the siren.I cant remember what type they are,so its a case of removing and finding a replacement from maplins or similar electrical stores.

[xmay4444]

Thanks for the info 'O wise 1'. Do you know where this thing is located and what i'm looking out for? What happens if i dont replace them?

[a8 tech]

passenger side rear luggage compartment,you could leave it but the siren will be inop if the car is broken into

[xmay4444]

Thanks, will check it out.

[T-sport]

Originally Posted by a8 tech

passenger side rear luggage compartment,you could leave it but the siren will be inop if the car is broken into

Im just curious as i never knew the alarm siren had battery back up power, is this the reason why the alarm siren is so quiet when it goes off ?? When you say back up does this mean if someone gets under the bonnet and disconects the main battery the back up ones kick in ??

[a8 tech]

yes t sport,also you can adapt the siren for different tones

[Badger61]

But it is quiet for noise emissions regulations! You don't want to annoy anyone while you car is being broken into!

[a8 tech]

Yes let those yobs break into the car without any interferance from noisey sirens as the police dont wont to be disturbed.

• +00001 = GB-Alarm (not USA)
• +00002 = Confirmation Anti-Theft Warning System (Blink)
• +00004 = Selective Central Locking (SCL)
• +00008 = Anti-Theft Warning System
• +00016 = Rear Lid Release Locking at 5 km/h
• +00032 = Central Locking at 15 km/h (or 10 mph)
• +00064 = Comfort Function via Remote Control (not USA)
• +00128 = Right Hand Drive (RHD)
• +00256 = Avant
• +00512 = Confirmation Close via Remote (1x Blink)
• +01024 = Confirmation Anti-Theft Warning Sytem Horn Activation
• +02048 = Door-/Window Regulator Logic
• +04096 = Thatcham Anti-Theft Warning (not USA)
• +08192 = No Safe-Function
• +16384 = Side Windows with Insulated Glass

Note: Coding is the sum of the individual options. Not all options apply for all control moduls

[T-sport]

Thanks a8 tech this is great info yet again from yourself and as ive never seen this discussed or posted about before im going to make it a sticky thread !!