[Chatstar123]

The TPMS sensors in the wheel are attached to the valve. They only measure the pressure in the tyre so it won't make a difference on the tyre make.

Coincidentally, a mobile tyre fitter is currently replacing all four tyres on my car for contact 7's all round.

 

[Roadhogg]

I have already paid for the fronts and rears through Blackcircles Neilr, and they are due for fitting on Monday. I really wanted the same make and designation of tyre on both ends, but they just didn't have the fronts in SC7's on the site.
I had looked up tyres on BlackCircles about a month ago, and was going to go for the Pirelli PZero's all round, but they seem to have jumped a bit in price since then.
It's cost £876 for the Continentals, was £960 for the P Zero's a month ago, but now is £288.13 rear and £218.95 front each inc fitting, totalling £1014.16

I read the reviews on BlackCircles and the Continentals seemed to be better than either the Dunlops or Pirelli's. I also read some threads on here talking about thin sidewalls on both the latter.

I am a bit biased against the Dunlop Sport Maxx's that are on it at the moment, although they were on about 3mm all round when I got it and are around 2mm now.
I am getting more road noise inside the car than I expect from a Jaguar, and it's a bit of a handful, especially in the wet, because it steps out so easily.
I am having to remember to put the DSC on whenever I start it to avoid broadsiding from A to B.

It does make driving interesting though when I forget the DSC, keeps me alert

 

[Roadhogg]

Chatstar may I ask where you sourced your SC7's, and how much they cost?
If the TPM sensors are attached to the tyre valve, and there isn't an extra valve, I will ask my fitter if the old valves have sensors, and are re-usable.
I am going to a BlackCircles premium garage, so they may even have some new sensored valves, at extra cost of course.

 

[Roadhogg]

Neilr and Chatstar123, are you guys both in UK?

 

[CanyonLakeJags]

CanyonLakeJag thanks. I am not sure how TPS works, but I gather there is an extra valve in the wheel rim. I also don't know if my TPS system is still working either, as it hasn't been triggered since I have owned the car. Maybe I will find out Monday when the Continentals are fitted
I will make the tyre fitters aware of the TPS.

I think that, in most cases, the valve stem is integrated in the TPMS sending unit; it has the electronics and battery in a (presumably) lightweight case with the valve stem integrated. So the fitter leaves that in place when they remove your old tire and fit the new one on. Hopefully they're smart enough to not grab and rip off the valve stem when trying to deflate the old tire.

I think they tend to run $30-$90 each. In my experience, the batteries aren't replaceable, as I've tried to get new batteries fitted when getting new tires and I've always been told I need to buy the whole sending unit.

 

[MrKis]

It does make driving interesting though when I forget the DSC, keeps me alert

I think the DSC will default to being on. So pressing the button when you start the car will turn it off.

 

[Chatstar123]

Chatstar may I ask where you sourced your SC7's, and how much they cost?
If the TPM sensors are attached to the tyre valve, and there isn't an extra valve, I will ask my fitter if the old valves have sensors, and are re-usable.
I am going to a BlackCircles premium garage, so they may even have some new sensored valves, at extra cost of course.

I'm based in the UK and got a local mobile fitter ro do it as the price was similar to what I found online. I paid £855 including £15 for the mobile fitting.

The valve stems might be replaceable individually but it depends on the type of sensor you have fitted and the company doing the replacement. Best thing to do is contact the tyre fitter and see what their policy is. They may have to see the sensor before they can give you an answer.

If you want the sensor to be replaced, I did read online somewhere that people have had trouble with non genuine ones but I can't confirm from personal experience.

There is no problem keeping the valves that are fitted as long as they are in good condition and the valve caps ( if they're metal) aren't corroded on.

 

[Neilr]

Neilr and Chatstar123, are you guys both in UK?

I'm based in Germany.

Wrt to the TPMS units, they are as CanyonLakeJag has explained, sealed units. They last apparently between 5-12 years and it probably makes sense to change them with an appropriately timed tyre change.

 

[Roadhogg]

CanyonLakeJags Thank you for the valve/sensor pic, it's good to know what it looks like, and a rough idea of the price.
Chatstar123 obviously I should have looked around more before ordering from BlackCircles....so lesson learned for next time. Prices are simlar to what you paid, but I have the older type front tyres with the SC 5P's. I don't know if the TPM sensors work at the moment, but if the fitters don't have original Jaguar sensors, the wheels and tyres are coming off for an all round wheel refurbishment in about 2 weeks, so I can order some new sensors for then.
MrKis The default setting for DSC may be changeable in the vehicle menu, so I will have a look when I take the car out on Monday. At the moment it's default is off unless I press the DSC button to turn it on.
Neilr i agree with you @ best to change them, considering their working status is unknown, and the batteries may have run out. Any advanced warning of an impending flat tyre has to be a good investment.

Thank you for all the help and advice gentlemen.

 

[JimboV8]

The default setting for DSC may be changeable in the vehicle menu, so I will have a look when I take the car out on Monday. At the moment it's default is off unless I press the DSC button to turn it on.

You may wish to read this as your understanding of the system is incorrect.

https://topix.jaguar.jlrext.com/topix/service/archive/70655/stability%20control.pdf

 

[Roadhogg]

JimboV8 my manual says exactly the same thing as the link you have shown. Before I answer I will check my facts on Monday, and get back to you.

 

[Roadhogg]

JimboV8 apologies for the delay in responding. I didn't get much chance to assess the difference in DSC settings when I went to get the tyres fitted, because the journey was in mainly 20mph-30mph limits for just 5 miles each way and heavy traffic.
I have no doubt you are correct, and my illusion that the DSC was active when lit...
was wrong.

 

[Roadhogg]

I accidentally posted the above before I had finished replying, so JimboV8 I can only assume the improvement in grip after de-activating DSC was down to changes in road surface.
It's comforting that it is on by default and I don't need to keep turning it on manually

 

[scrubber]

I don’t have the tpms on mine, not sure if it was ever fitted or just deactivated, you can tell by the valve stem, mine are rubber so no tpms fitted, some cars have a system that doesn’t use sensors but relies on measuring wheel revolutions, with these you have to reset if new tyres are fitted, just make sure pressures are all correct before pressing the reset, then it measures the wheel revolutions once it is driven in a straight line for long enough.

 

[Roadhogg]

Hi scrubber, I am not sure what type I have, but the black base feels metal. They don't look the same as in CanyonLakeJag's, pic though, which are all silver down to the battery casing.
The tyre fitter said that, ( on the assumption I had the sensored type ) if the battery runs out too low in a sensor or one tyre is much lower than the others, I will get a warning in the instrument panel. He didn't have Jaguar sensors in the premises and I have had no warnings, so he refitted the existing valves with sensors I assume. The valves don't look new.