My TPMS sensors were all replaced under warranty when one started leaking very slowly. Jaguar has issued a service bulletin about this. When two of the new sensors failed to work correctly, threw a fault, they were also replaced. Total of 6 new ones in five days. I'd mention to the dealer that an accident due to failure to update all four sensors might result in interesting litigation for anyone involved in the refusal to fit new ones.

 

I asked the dealer about my 2011 XF Prem. today and he showed me the service bulletin indicating that the affected years were 2009-2010

 

So the '11s don't have this problem?

 

This is the kind of urban legend that Myth Busters loves. No way the TPMS had anything to do with the OP's issue. TPMS isn't a substitute for insuring tires are properly inflated and in road worthy condition to drive on.

 

Unfortunately it is a real problem. The valve assembly snaps and the valve innards are ejected causing a total and immediate loss of pressure. Jaguar has acknowledged the design is defective and a new specification TPMS assembly is now used which even looks more robust.

There is nothing the owner can do to prevent this failure except insist the dealer change out ALL the old spec TPMS valve assemblies.

The aphorism in your signature should be followed, ironically.

 

Hi,

This really sounds scary....issuing a service bulletin does not cut it IMHO....they should recall and get this sorted...and not wait too long.....see what happened to BMW recently...Reuters) - BMW AG (BMWG.DE), the world's largest premium carmaker, is recalling about 1.3 million cars for repair worldwide due to a possible problem with a battery cable cover in the trunk, the carmaker said on Monday.
The recall affects 5- and 6-Series BMWs built between 2003 and 2010, BMW said in a statement.

BMW recalls 1.3 million cars worldwide | Reuters

Cheers

 

My car is at the dealer now since I now noticed the remaining front 2 TPMS sensors reflect " Tire not Monitored" when above 70 MPH. This is basically the conditions that when my rear tires went out. If the fronts go out I dont think I would be able to control the car. This is a real safety hazard. I have a open case and case # with Jag directly and they have agreed with my concerns and this is why my 09 XF S/C is at the dealer now getting outfitted with revised sensors.

They tire damage the OP is pointing out is caused by the side belts being broken from driving on low tire pressure.If I had working TPMS sensors that told me this and not give me no warning at all I wouldnt know I almost instanly lost all pressure in that tire. I was at a good speed o nthe freeway so I felt nothing until I heard the flapping of rubber. I should have first seen low tire warning and or tire not monitored message.

 

When the new TPMS sensors were first fitted to my XF it took the mechanic two tries and six new sensors to get four that worked.

 

If a wheel is spinning in place, the valve stem sees only centripital force outward in the radial direction. This force will increase with the rotational speed of the wheel. Held at constant speed, this force will remain constant, so the cycling of this force would be extremely low.

Combined with forward motion of the wheel going down the road, the valve stem sees a variation in this force with every revolution of the wheel. Since all of us drive our cars down the road, not up on a rack, our little valve stems see a lot of fatigue cycles. The mass of the cap is a big player here. As has been said in another thread, there is a service bulletin on these TPMS sensors. Sounds to me like it should be a recall. Anyway, don't risk your life for the vanity of a metal cap. Switch to plastic and make sure you get the questionable TPMS sensors off of your car.

 

Yes sir. After the third one failed on my car ( there are only, four) I became a believer in the catastrophe posts. It is really happening and it s really dangerous. Get yours fixed NOW!

 

Any way you can obtain the service bulletin number? My 09 doesn't seem to have a problem even though the tires have been replaced twice, but I'd like to have the number so I have something to wave at the dealer other than my arms.

 

Maybe this:
JTB00165NAS3 - Tire Valve Stem Damage During Manual Tire Pressure Checking or Low Tire Pressure Warnings Illuminated - Repair Procedure

It's rather absurd to me that you could "damage during manual tire pressure checking". If it could fail when you were checking, then it was on the verge of failing while rolling anyway.

Try logging in to Topix to search for others.
Jaguar USA - OWNERS MANUALS
Look for the line that says "Please click here to view an online version of your manual." and then click on the "click here" to get started.

 

I am also on a UK board and there are a lot of XF sold in that market. There have been a number of these failures reported. The valve stems seem to fatigue and become brittle. This is a common failure mode for aluminum. Why they use aluminum is beyond me. Anyway, my theory is the same vibration forces that caused mine to leak at the rim seal eventually cause fatigue failure. The solution is to make the valve stems from better alloy.

 

The sensors are not a jaguar part but stamped ford motor company. And yes i always write down the id number of sensors and program. Too many times ive tried to do accordingly with test drive and they dont learn the new sensors. If theyre already programmed to the module, when you rotate it will see where the new locations are and change accordingly.
Not use tpms sensors??? Really i would never go without them again. They have saved me on more than one occasion with my own cars and i used to see jags come in all the time with 10-20 psi in the tires for service or oil change. Now i never do. So they are a good safty feature and reduce fuel consumption based on this alone. Tpms themselves a safty issue. No more the rubber valve stems of days gone by. They too break off, crack and leak etc... Nothing new there either. Metal caps bad, yep.
Is anything perfect? Nope

 

So is Jaguar's willingness to replace the TPMS's limited to pre-'11 cars? I guess I'll find out as my car goes in for its annual next week.

 

Have metal value stem caps in my Porsche 997 for 5 years without an issue. Had 'em on the Boxster for 7.5 years. I used a little aluminium based anti seize paste on the threads before installing the caps. No problems to date with shreaded or exploding tires.

 

I wish I had your Porche TPMS instead of these here Fords. I'll take the advice of the Jaguar Tech two posts above, and stay away from the metal caps.

"No lesson is more painfully learned than one that is a consequence of inaction. Question everything." - I agree.

 

So it appears that the dreaded valve stem caps were not exactly the cause, possibly under-inflation. Hey, is this the same car you just sold to your buddy with these defects and used the cash for a new 2010 XFR? Just a couple of suggestions the 510 HP XFR makes so much power it's silly compared to the 09 SC, so be careful. Take an air gauge and check your tires regularly. I would avoid racing AMG's on a public highway.

 

All of my TPMS sensors were changedto the new black ones they use on the 2011's before I sold the car. The dealer does identify these to be the issue and will pay for damages now they have looked into it deeper.

 

Please let me know what you find out. The ones on my 2011 appear to be the re-designed (they are black anodized looking rather than a silvery aluminum color) ones and my dealer told me only the MY2010 and before were the problamtic ones. It would be interesting to see if you are told the same.