I've just changed my front wheel following a rapid deflation this morning.

Changed the wheel and couldn't find any damage to the tyre. Then turned unscrewing the valve cover very gently and it just came away in my hand. The below picture illustrates.

So, is this a classic corroded, failed TPMS valve?

Click image to enlarge

Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated

thats what happens ..

different metals and water [salt] causes the corrosion .... ... - .- -.




Y. O. L. O.
.

Best thing to do is ditch them and disable it with the IIDTool  Got - 2017 SDV8 Autobiography in Loire Blue
Had- 2008 TDV8 Vogue SE in Java black
Had - 2007 S/C in Stornoway Grey

Thanks.

Just making sure.

To be fair, if it was a serious puncture then it'd be a new tyre. And that would mean replacing the other front to get even tread depths, so £500 there.

If it was a mild puncture, it wouldn't have deflated so rapidly but I may have been stranded on the way to work.

(Lucky the blasted thing went at home - a rapid deflation on the M3 at 80mph doesn't bear thinking about...)

But new valves (potentially) as I don't have an IIDTool and so that's another cost.

Once again, thanks!  Si. <This is my name.

I eat rat poison.

A man ain't truly been insulted until he stands buck naked in front of a woman and she didn't even notice. Or care.

If one valve has gone, then the others can't be too far behind......

Do the man maths - IID tool time

You're right.

I've 'grounded' my SC until the valves are done.

Only option is to use our E55 for the daily commute.

Where's best to get the IID tool from? Si. <This is my name.

I eat rat poison.

A man ain't truly been insulted until he stands buck naked in front of a woman and she didn't even notice. Or care.

Can you just not un-plug the ECU or for that matter pull a fuse?
You could if it was fitted to earlier cars.

No. If another valve goes suddenly like it did yesterday, it's potentially lethal.

I was lucky yesterday when it went in 1st gear straight off my driveway.

One completely flat tyre is enough. I really don't need that happening at 80mph.

Once the valves are replaced, I can drive with the error codes until they're cancelled. Si. <This is my name.

I eat rat poison.

A man ain't truly been insulted until he stands buck naked in front of a woman and she didn't even notice. Or care.

is it the rubber ones you are going to have fitted? . ... - .- -.




Y. O. L. O.
.

I don't know yet.

A set of non-OEM TPMS valves can be had for £60.

That's against £270 for the non-BT IID tool.

Tyre removal, balancing and refitting on top of that.

To be honest, the non-OEM TPMS valves are tempting as I really don't know what I'd do with the IID tool after I switched off the TPMS. Is it really worth the extra £200? Si. <This is my name.

I eat rat poison.

A man ain't truly been insulted until he stands buck naked in front of a woman and she didn't even notice. Or care.

pretty sure that the new tpms valves will be automatically detected by the FF's system and the dash light error should switch off..


from the WM,
If the tire pressure sensors fitted to the running wheels (not the spare) are changed, the module can learn the new sensor identifications automatically. The learn function requires no manual intervention by the driver.
 ... - .- -.




Y. O. L. O.
.

Si,

PM sent re your TPMS failure.

Here is the forum IID Q & A Link with a list if things the device can do too, including allowing you to establish any vehicle fault codes that you can give to a garage perhaps avoiding their diagnostic fees:
http://www.fullfatrr.com/forum/topic12418.html?highlight=iid

Bellini's finding re the deflated tyre raises an interesting consideration:
His experience does appear to be a similar type of failure that resulted in me discovering ours were shot at, it's just Bellini's seem to have resulted in air loss due to 'non touch' disintegration whereas in our case, when I carefully 'touched' the TPMS valve with an air hose connector, that's when ours disintigretated and the air escaped.

A worrying potential safety concern though and perhaps worth reporting to both LR UK and to the selling dealerships of afflicted vehicles as it raises the question as to whether or not these things are actually being checked during Approved Used Pre Sale Inspections?

In our case, the car was supplied fitted with 4 x new dealer fitted tyres and yet a week or so later when checking the air in the tyres, valve disintegration occurred causing air loss and to an uninitiated layperson like me, the valves visibly looked done anyway, giving rise to suspicions that a person(s) had either been ignorant to the fault type or perhaps chose to ignore the possibility of replacement on cost grounds.

Another question raised is:
If the original TPMS valves were of a design fit for purpose and safe, why did they see a need to upgrade them to zinc coated ones that won't fail?

Last edited by pld118 on 3rd Sep 2014 8:17pm. Edited 1 time in total

OK, I've decided that the non-OEM TPMS valves could be a short-term thing. I don't know, but I don't want another failure and I'm somewhat unsure of the quality.

So I feel replacement standard valves and an IID tool is the better way forward. I can put PunctureSafe gel into the tyres, which I've used on my motorhome, to 'safeguard' against slow punctures.

The IID tool should also be worh something should I ever decide to sell, so that's a factor to consider. Si. <This is my name.

I eat rat poison.

A man ain't truly been insulted until he stands buck naked in front of a woman and she didn't even notice. Or care.

I replaced my TPMS valves when I replaced my tyres 18 moths ago with new OEM ones (Siemens JLR) purchased for about £50 from eBay

Re-synced to the car when fitted and have been fine since (other than the occasional wobble when the system says it's not working, then 'fixes' itself some time later )

If you're going to use them, I would treat TPMS valves as a consumable and replace every 3-4 years (approx every 2nd set of tyres)  2007 Zermatt Silver TDV8 Vogue SE - now sold but was a great car!

50 quid is good, we were told that main dealer would be around £400 for new valves and fitting from memory