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Tyre pressure monitors |
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smihaialex
 
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  Member No: #1031
Location: Bucharest |
Hi guys, Do you know where I could get my hands on a couple of valve shaft replacements for the TPMS sensors? I have 2 Citroën original part sensors with corroded valves. I know that Citroën only sells either the complete sensor, or a "repair kit" as they call it, which only includes the washer, the nut, the valve mechanism that goes inside the valve shaft, and the valve plastic cap, but inside the 4 threads that talk about this topic I found on our website, someone was saying that you could actually only get the valve shaft from somewhere and replace it... Can you recommend a website that sells them?!? Or perhaps, and forgive me for daring to ask this, if you know of a physical store, I could wire you the amount and you could buy them and send them my way?!?  Thank you very very much, Sam |
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C6Dave
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    Member No: #1
Location: Northumberland |
Replied to your other post but to see them on eBay - Click Here - | ||
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gmerry
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 Member No: #21
Location: Scotland |
Hi Sam, here's a couple of points to consider:- 1/ the battery life inside the sensors is about 7 years (ish) 2/ new stem kits (ebay sourced) are around £30 (old corrosion resistance) 3/ new OEM Siemens/VDO sensors with improved materials/corrosion resistance are around £60 (Try World Car Parts - Click Here - ) 4/ to remove the old stems without damaging the sensor requires some tooling (I posted on this, use a special piloted drill). If you are planning on keeping the car for more than a year or so, you may just decide to fit new sensors (do this when replacing the tyres). Regards G Just guessing, but the "new" stem kits available form ebay are old stock and hence don't come with the improved anti-corrosion treatment. The new items I have purchased from World Car Parts seem to be new stock build to an improved specification. |
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James
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  Member No: #817
Location: Somewhere in the south of England |
gmerry wrote ... 4/ to remove the old stems without damaging the sensor requires some tooling (I posted on this, use a special piloted drill). Which may be why when I had 2 go I was told the stems couldn't be changed. Can only be changed with special tools might have been more accurate. Citroen paid for mine under warranty |
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smihaialex
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Member No: #1031
Location: Bucharest |
Thank you @gmerry! In fact, on my car right now, I have 2 brand new sensors, and 2 older ones, and what I was thinking was to get another couple of brand new ones, as well as a couple of valves... In doing so I would have a set of brand new ones and a set of older ones - I could use the new ones for summer wheels/tyres, and the old ones for winter wheels/tyres... Thanks again, Sam |
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gmerry
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Member No: #21
Location: Scotland |
Hi all, the tooling required to remove a frozen corroded valve stem without destroying the sensor is just a special drill bit (10mm with a 4.2mm piloted tip). The link to C4 Owners shows how it is done. - Click Here - gmerry wrote ... Hi, the mechanics guide recommends replacing the alloy stems, seals and inner valve core when the tyres are replaced. We all know of people that have had the valve fail in service (due to corrosion and fatigue) so this is probably good advice. I've not had a lot of sucess with tyre fitters and servicing these valves. At the first tyre fitter, we agreed to just leave in situ because the fitter did not have the T5 screwdriver to under the screw that holds the aerial tag onto the stem. At the 2nd place, we agreed that I would undo the stem nuts and basically because of the corrosion, the entire transmitter was destroyed. A 3rd approach is to machine out the old stem. As per the photos, I used a 10mm counterbore drill bit which has a 4.2mm pilot. Drill Services of Horley suppplied this. - Click Here - The Pilot prevents the drill slipping and marking your nice alloy wheel. The pilot also stops the swarf falling inside the tyre. The 10mm bit removes all the thread and then the transmitter will just fall back into the wheel without any damage. Retrieve this as part of the tyre changing exercise and fit a new service stem and seal. I used a bit of WD40 on the bit to stop the aluminium welding itself to the bit. Regards G       |
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smihaialex
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Member No: #1031
Location: Bucharest |
Ahhh... ok... mine were coroded just at the top so removing them was no problem whatsoever But thanks for the tip - good to know! Cheerios, Sam |
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James
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Member No: #817
Location: Somewhere in the south of England |
Just to bump this thread back. I had another sensor (rear, nearside) fail, at speed on Sunday (on a dual carriageway - no hard shoulder - lots of fast traffic). Normal, to low pressure to Puncture reading in a couple of seconds, fortunately very near to a parking place where I could change the wheel. That's two high speed blowouts due to something which is known to be a problem. It does seem to me that these things are potentially dangerous and should be the subject of recall (and not just citroen other marques have the same sensors) It's back with my local dealer who had tried to get all 4 replaced when the first ones went. Of course the car was in warranty then and is out of warranty now so he's leaning on Citroen for goodwill. |
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smihaialex
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Member No: #1031
Location: Bucharest |
Are your sensors the new ones, with supposedly better anti-corrosion treatment, or the old ones, known to be prone to this issue?!? Thanks, Sam |
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James
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Member No: #817
Location: Somewhere in the south of England |
I don't know what treatment they've had, but my car was registered in 2010 with a ORGA date of late 2008. They have metal stems with a metal nut which causes galvanic corrosion. I believe the newer ones have rubber/plastic stems and so don't have this problem. | ||
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smihaialex
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Member No: #1031
Location: Bucharest |
Newer ones are darker, like black anodised aluminium, while the older ones are a light shade of silver... Cheerios, Sam |
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James
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Member No: #817
Location: Somewhere in the south of England |
In that case mine are the old ones. | ||
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smihaialex
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Member No: #1031
Location: Bucharest |
Well, maybe that explains it - make sure to get the new kind when replacing, and treat with a small film of lithium grease and you should be fine Cheers, Sam |
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gmerry
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Member No: #21
Location: Scotland |
James, sorry to sound unhelpful but the valve stems are supposed to be changed whenever the tyres are replaced (and presumably you are not running on original rubber). When ordering replacement valve stems, you will need to purchase from a fast turnover supplier to get the latest OEM anti-corrosion treatment. There is no change in part number, just Siemens "continuous product improvement". I suspect Citroen dealers may have slow moving stock so would not purchase from them (also high prices). I have posted before that World Car Parts provides fresh stock with the improved anti-corrosion treatment. The completely different design of sensor with a rubber / brass valve stem is not compatible with the C6 TPMsystem. Regards G PS, the newer valve stem colour is just a tiny shade darker than the originals, certainly not black!!! |
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smihaialex
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Member No: #1031
Location: Bucharest |
The valve is black, the stem is the same silver colour, and yes, you need the repair kit (incl. new stem, new washer, new valve and new cap) every time you take the sensors off the alloys, BUT... 1. You don't need to take the sensors off the alloys every time you change a tyre...  2. It's not the stem that gets corroded and breaks and causes the tyre to rapidly deflate, it's the valve itself, and Siemens doesn't sell just the valves Cheerios, Sam |
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