How to Replace the Alarm Siren Module

swedishandgerman · Jul 3rd, 2010, 23:23

I had a faulty alarm siren module that kept going off and here's how I replaced it:

Volvo Part Number 9499758. This is a complete alarm kit which costs less than just a replacement siren (??), but also provides some useful bits such as some good quality pop-rivets. Most of the remainder remains in the box, unused .

Firstly, you need to disconnect the battery.

Then, seeing as the siren is positioned inside the front wing in front of the OSF wheel, you need to partially remove the inner wheel-arch liner. Jack the car up, support on axle-stands and remove the wheel so that you can get in there to drill out the pop-rivets using a 6mm drill:

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You also need to undo 2 x nuts holding a metal plate. Then pull the arch-liner out of the way to reveal the siren:

http://

You have to remove the siren complete with its bracket which means undoing a security type bolt. I tapped the edge of it with a small hammer and chisel to free it, then managed to undo it with a small pair of mole grips:

http://

On removing the old unit, I undid the lead then connected it to the new unit and put it in place on the bracket provided. A new bolt is supplied with the kit with a torx head. Once you tighten the bolt, the torx head breaks off so that the bolt can't be undone again for security.

At this stage, I re-connected the battery, set the alarm and requested a cup of tea from Mrs Germanandswedish. In the meantime, the alarm didn't go off - good job; problem solved. Then having unlocked the car I put down a window and reset the alarm. After about 10 seconds, I put my arm into the car to check the interior movement sensors. All good - the alarm went off.

Then I proceeded to re-secure the wheel-arch liner using a good quality pop-rivet gun. I made sure there were no sharp edges left using a file, put the wheel back on and lowered the car.

Delighted to say that the alarm hasn't gone off since.

swedishandgerman · Jul 3rd, 2010, 23:50

Forgot to mention that my local and wonderful Volvo dealership, Kastner of Exeter, kindly read my fault codes without charge which showed that the siren was faulty, but everything else (including interior movement sensors) are ok.

I'm told that alarms going off are usually due to faulty sirens (alarm modules, or what ever you want to call them) but can frequently be faulty interior movement sensors.

Would have been annoying to have changed the siren then to find out it was the sensors!

carl4u44 · Jul 4th, 2010, 00:01

So once the dealership read the fault code did they reset the fault? This happened to mine and I replaced the siren, which now the alarm works 100%. However when I enter the car from unlocking it, a fault message appears then goes away..

swedishandgerman · Jul 4th, 2010, 12:00

That's different from mine. I didn't have any fault messages before or after replacing the siren

sae70 · Jul 5th, 2010, 11:42

I have not been on for a while (busy family life) but I've today just been down to reset my alarm 5/6 times so far! It has even gone off after leaving it set with the sensors turned off! So got out my PPC code reader & I have the code UEM0004 (siren) is all it says in the book, so I'm wondering if mine has just developed this the same fault.

How much did you pay for the kit?

swedishandgerman · Jul 5th, 2010, 12:07

It appears that yours is doing exactly what mine was doing. Ended up locking it with the key in the door until I replaced the siren.

Easy job to do as long as you own a pop-rivet gun. Undoing the bolt was a bit of a fiddle though.

I paid £81 for the part.

carl4u44 · Jul 5th, 2010, 12:32

Since I replaced my siren, im wondering can only the volvo dealership reset the alarm fault message?

sae70 · Jul 5th, 2010, 15:30

Quote:

It appears that yours is doing exactly what mine was doing. Ended up locking it with the key in the door until I replaced the siren.

Cheers for that I have not tried the locking with a key trick. It's now going off every 45min or so even though I've isolated the mass movement sensor & emptied the centre console of coins, sunglasses, tape measures etc.

Do you remember what the fault code was that yours threw up?

Quote:

Since I replaced my siren, im wondering can only the volvo dealership reset the alarm fault message?

No! But you will need a PPC code reader or simular, about £150 from Nordic, I reset mine this morning with one.

swedishandgerman · Jul 5th, 2010, 16:11

Quote:

Originally Posted by sae70

Do you remember what the fault code was that yours threw up?

Sorry - I don't know the code.

sae70 · Jul 5th, 2010, 16:29

Oh & just checking that this was on your 2001 V70 that you replaced the siren?

Jul 3rd, 2010, 23:23	#1
swedishandgerman Premier Member Last Online: Oct 23rd, 2023 21:39 Join Date: Apr 2007 Location: EXETER	How to Replace the Alarm Siren Module I had a faulty alarm siren module that kept going off and here's how I replaced it: Volvo Part Number 9499758. This is a complete alarm kit which costs less than just a replacement siren (??), but also provides some useful bits such as some good quality pop-rivets. Most of the remainder remains in the box, unused . Firstly, you need to disconnect the battery. Then, seeing as the siren is positioned inside the front wing in front of the OSF wheel, you need to partially remove the inner wheel-arch liner. Jack the car up, support on axle-stands and remove the wheel so that you can get in there to drill out the pop-rivets using a 6mm drill: http:// You also need to undo 2 x nuts holding a metal plate. Then pull the arch-liner out of the way to reveal the siren: http:// You have to remove the siren complete with its bracket which means undoing a security type bolt. I tapped the edge of it with a small hammer and chisel to free it, then managed to undo it with a small pair of mole grips: http:// On removing the old unit, I undid the lead then connected it to the new unit and put it in place on the bracket provided. A new bolt is supplied with the kit with a torx head. Once you tighten the bolt, the torx head breaks off so that the bolt can't be undone again for security. At this stage, I re-connected the battery, set the alarm and requested a cup of tea from Mrs Germanandswedish. In the meantime, the alarm didn't go off - good job; problem solved. Then having unlocked the car I put down a window and reset the alarm. After about 10 seconds, I put my arm into the car to check the interior movement sensors. All good - the alarm went off. Then I proceeded to re-secure the wheel-arch liner using a good quality pop-rivet gun. I made sure there were no sharp edges left using a file, put the wheel back on and lowered the car. Delighted to say that the alarm hasn't gone off since. Last edited by swedishandgerman; Jul 3rd, 2010 at 23:38.

Jul 5th, 2010, 11:42	#5
sae70 Member Last Online: Dec 6th, 2022 21:44 Join Date: Apr 2009 Location: Nr Chelmsford in Essex	I have not been on for a while (busy family life) but I've today just been down to reset my alarm 5/6 times so far! It has even gone off after leaving it set with the sensors turned off! So got out my PPC code reader & I have the code UEM0004 (siren) is all it says in the book, so I'm wondering if mine has just developed this the same fault. How much did you pay for the kit? __________________ Link to my Albums Link to my YouTube Videos

Jul 5th, 2010, 16:29	#10
sae70 Member Last Online: Dec 6th, 2022 21:44 Join Date: Apr 2009 Location: Nr Chelmsford in Essex	Oh & just checking that this was on your 2001 V70 that you replaced the siren? __________________ Link to my Albums Link to my YouTube Videos

Jul 3rd, 2010, 23:50	#2
swedishandgerman Premier Member Last Online: Oct 23rd, 2023 21:39 Join Date: Apr 2007 Location: EXETER	Forgot to mention that my local and wonderful Volvo dealership, Kastner of Exeter, kindly read my fault codes without charge which showed that the siren was faulty, but everything else (including interior movement sensors) are ok. I'm told that alarms going off are usually due to faulty sirens (alarm modules, or what ever you want to call them) but can frequently be faulty interior movement sensors. Would have been annoying to have changed the siren then to find out it was the sensors!

Jul 4th, 2010, 00:01	#3
carl4u44 Master Member Last Online: Sep 7th, 2023 17:21 Join Date: Feb 2009 Location: kk	So once the dealership read the fault code did they reset the fault? This happened to mine and I replaced the siren, which now the alarm works 100%. However when I enter the car from unlocking it, a fault message appears then goes away..

Jul 4th, 2010, 12:00	#4
swedishandgerman Premier Member Last Online: Oct 23rd, 2023 21:39 Join Date: Apr 2007 Location: EXETER	That's different from mine. I didn't have any fault messages before or after replacing the siren

Jul 5th, 2010, 12:07	#6
swedishandgerman Premier Member Last Online: Oct 23rd, 2023 21:39 Join Date: Apr 2007 Location: EXETER	It appears that yours is doing exactly what mine was doing. Ended up locking it with the key in the door until I replaced the siren. Easy job to do as long as you own a pop-rivet gun. Undoing the bolt was a bit of a fiddle though. I paid £81 for the part.

Jul 5th, 2010, 12:32	#7
carl4u44 Master Member Last Online: Sep 7th, 2023 17:21 Join Date: Feb 2009 Location: kk	Since I replaced my siren, im wondering can only the volvo dealership reset the alarm fault message?

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