Collar Nut Failure On Tyre Pressure Sensor?

[splinternet]

I think I'm lucky to be here to write this.  A couple of days ago, I was thundering along in the outside lane of a 3-lane carriageway (A road, not M-way) in my C5 Tourer when the puncture alarm went off. Fortunately I retained control and safely made it to a handy lay-by.   I hopped out and found the front offside tyre completely deflated, plus a very pronounced smell of burning rubber.  I assumed a blow-out but the AA guy who came to change the wheel pointed out the valve was loose so he thought this had failed.  When I took the wheel to a local tyre store, they discovered the valve was actually a pressure sensor emitter but without the nut which secures it, he pointed to some corrosion to the threads of the sensor and assumed a catastrophic failure in the collar nut.   Inspection of the other wheels shows the corresponding nut on the nearside front wheel is clearly cracked and presumably awaiting the same fate.

 

Does anyone know of this problem?   The car is 5 years old and both front tyres were new less than a year ago - I don't know if this is relevant.

[Johndouglas]

Does anyone know of this problem?

Your problem rang a bell. Sure enough a search through the files revealed this topic:-

http://www.citroen-owners-club.co.uk/citroen/topic/10809-tyre-pressure-monitor-valves/

I ran a Mk2 Exclusive from 2005 till very recently and in all that time I never had any problems with the system.

[paul.h]

Failures of the tyre pressure sensors are included in the Common Problems pinned post in the Technical Section.

 

26. Tyre pressure sensor failure.

This seems to be a particular problem on the mark 3 C5 (2008 on) where the valve stems can crumble. It is possible to just replace the stems with a repair kit for £9.99, ref Robhall77. See http://www.citroen-o...sor/#entry75957

Plastic caps instead of metal will also help.

 

 

 

I have moved your topic in to a subforum since ones outside of one do not show after a few days and are then difficult to find.