SuperbDP

Happy to report it's fixed, no more fountain. I had planned to prise one of the little nozzle balls out of the used part I bought, but when I saw how the whole front part comes out, I just swapped it. It is secured with a little plastic spring clip that you have to gently prise up to disengage the ratchet, then the unit just pulls out. It's a bit fiddly fighting the spring, I pulled the piston right out and then put my mole grips on it to keep it out.

Thanks again, now that my ebay used unit has arrived I can see what you mean - this whole nozzle end is actually removeable from the front without having to dismantle the car to get the whole piston unit out, that's what those part numbers are. I just assumed those part numbers were the whole piston. I will have a go at swapping this out now.

Thanks, yes those are the entire arm assemblies - it's just one of the two ball-shaped adjustable jets that has popped out that I need. I have ordered a used arm from ebay, I'll have a go at popping one out of that and seeing if it will just push in, or maybe I'll have to glue it, but at least it will be a fix without having to dismantle the car.

My 2012 Superb (3.6l V6) exhibited this exact behaviour when I changed the battery - I turned the ignition on and felt sick, I thought I'd fried something. But it was just everything sorting itself out after a complete power loss, it only did it on the first start and everything was fine after a minute of driving. So might this be pointing to a battery or alternator problem of some sort?

Well, after some searching I found how these things work - they are basically a spring loaded piston, when water is pumped in the piston extends out and the water sprays the light, when the water stops and pressure drops the spring pulls them back in - so with some careful prising against the spring pressure you can just pull them out. I found that one of the two nozzles has gone, so I get half the light cleaned, and a decorative fountain. I can see this is going to be a painful fix, because I doubt the nozzle can be replaced (if I can even find one), and to replace the whole assembly is going to require disassembly of a lot of car... and this is likely to be an MOT fail next time around...

I have a 2012 Superb Elegance, and I need to adjust/fix the passenger side headlamp washer. They both still work moving out and in again, but for some reason the passenger side has started spraying up in the air instead of at the light. When driving, the spray hits the windscreen. If I am stationary, it looks like an ornamental fountain. So - is there some weird incantation way of making the jet stay out so I can look at and adjust it, or will it pry out, or do I have to disembowel the front of the car?

One more follow up for anyone considering a replacement from aliexpress - when I bought mine, I considered it a risk still worth taking because I didn't think returning something shipped from China would be an option - but it is. I initiated a free return when I found it was an option, and was sent a prepaid royal mail label addressed to a handling centre in the UK. As soon as it had been scanned by royal mail, my refund was issued. So I would say even though mine didn't work, if you need one of these, it's worth giving aliexpress a try because you CAN return it if it doesn't work. Some of them must work... and my car continues to be ok for now with the used one installed.

When mine started going off soon after locking, I googled it and consensus seems to be this happens when the battery is failing - but the siren still works. Mine then stopped making any sound. I don't think it normally then progresses to stopping altogether, I think mine died for a different reason. The battery was indeed dead, but I replaced it and it still didn't work. But given these things have a stated lifespan of 6 years I think replacing it at 12 or more is a reasonable course of action before it starts causing problems. The used one I now have installed is from a 2015 car, so I may be replacing the battery in that in a couple of years... If you have a vcds reader, the car does record a low voltage error on the siren apparently, which is another way of spotting the problem, but I only have a cheap obd reader and that doesn't pick that up.

For everyone's info - I bought another used unit on ebay, primarily to prove if the fault was in my chinese unit, or elsewhere on the car. The used one (also the newer part number 1K0 951 605C) works perfectly, so the aliexpress one is definitely dodgy. I don't know how much life I'll get from this used unit but I know how to open them now so I will replace the battery in this one when it is needed. I am pretty sure now that my original had died in some other way other than just the battery failing.

Thanks, I suspected my reader was not telling me everything. Where else did you source one from?

Mine is indeed there, took me an hour of gentle prising and rubbing in soapy water just to get the plenum cover to start to move, but my siren was even more awkward because it is not attached to that metal brace pictured on that other topic, it is mounted on a bracket which attaches over the top of that air inlet, and there is another plastic cover screwed in over all of that, which is extremely fiddly to get out as it seems the car was assembled around it, and it also has the wiring for the heated windscreen attached to it, which is a very flimsy thing attached with tiny screws.

I posted recently asking about where to find the siren on a 2012 Skoda Superb, I had trouble with the alarm going off a few minutes after locking, then it stopped making any noise, figured it was the siren battery, 12 years seems way past expected life. Thanks to help I found it - below windscreen, awful to get at. Anyway, I got it out... First I managed to get it open and confirmed battery was dead - it read 1V (6V battery). I sourced a replacement battery (reads good 6V+) and soldered that in, but the siren remains dead, still doesn't chirp on lock/unlock, doesn't sound when alarm triggered. So I bought one on aliexpress. It looks new and genuine. The original part is 1K8 951 605B, the replacement (which had several part numbers on the listing including this one) is 1K0 951 605C. I believe these to be compatible... But when I connect the new siren, it just chirps constantly roughly every second. When I lock/unlock or turn ignition on, it makes more strangled chirping sounds, but doesn't sound quite right, continues to chirp every second, and it does NOT make a loud siren noise if I trigger the alarm. I have a cheapo obd reader which seems to talk to the car ok but says there are no errors stored. Vehicle battery is good. Has anyone seen anything like this? Is there something that needs doing to tell the car about the different part, or could the new siren be faulty, or could there be a problem elsewhere in the alarm system?

I realised I put this in the wrong forum (Mk1 instead of Mk 2) but thanks for the reply. I will look in those locations. As for being sealed - I'll open it! Cheers.

I have a 2012 Superb Elegance estate 3.6l V6 4x4 which I have owned from new. It has started setting off the alarm about 10 minutes after parking up. The alarm turns off ok. Vehicle battery was changed just under 2 years ago, seems fine. From my initial research I am leaning towards this being the backup battery in the alarm siren failing..?? It seems getting 12 years out of it is good going. I am confident I can replace the battery myself, but I have no idea where the unit is. Does anyone know for sure the location on this particular model? I found a post somewhere for a 2011 Superb which said it is in the rear right corner (looking from front) of the engine bay next to the bonnet hinge, but in the photos they put up the bay looked completely different (obviously not the V6) and I cannot see anything in this area on mine, although I haven't stripped out the cover there yet. I know other Skoda models have it under the offside front wheel arch but I don't want to start stripping that out unless I KNOW it's there... Cheers.

Sorry - wrong thread.