Last winter I got a blow-out on the Jag. Turned out, due to a crack in the wheel, the tyre had slowly deflated and I'd driven at 80+ on a flat.
So one of the things I love about my shiny new RRS is the TPMS.
I looked at my Discovery Sport this morning and the front tyre looked a bit low. Argued with myself as it has TPMS also but checked it and it was a tad low. Actually according to the readout on the dash, they were all over the place but clearly not enough to trigger a warning. I knew it had a tolerance but it's greater than you might imagine so I got the pump out and set them correctly.
On the basis of this, I checked my RRS. It's had main dealer yadayada 3 weeks ago so should be ok. The fronts were close enough but the rears way too high - yet no warning!
Then I was about to wrap up and I thought, what about the spare?
29psi - should be 60!!
So point of this post - don't do as I did and rely on the TPMS - I'm sure it'll save you if you get a slow puncture but for normal use there's no substitute for checking the pressures on the dash every now and then. Also, the spare (if you have one) isn't monitored and probably hasn't been checked for years - so check that too.

BTW - I recently bought one of those chinese automatic digital pumps that run off your de-walt drill battery. Brilliant piece of kit and the first pump I've ever had with an accurate gauge - no more faffing with manual pressure testers, cables and cigarette lighter plugs. Should have bought one years ago.
https://www.amazon.co.uk/dp/B0DM5WZT1H?ref...in_title_1


Fabulous piece of kit - 2021 L494 D300MHEV Autobiography
2019 Discovery Sport D180 HSE

Just buy one of these. I use mine all the time - no faffing around.

Looks nice if you have access to one but I'm not sure many of us can justify £400 for a tyre inflator.
Equally, I don't imagine mine would survive very long in a commercial environment. 2021 L494 D300MHEV Autobiography
2019 Discovery Sport D180 HSE

"Looks nice if you have access to one but I'm not sure many of us can justify £400 Shocked for a tyre inflator. "

But you can justify a recent Range Rover Sport. £400 is only one and a bit tyres.

I have one of these.......

MAKITA DMP180Z 18V LI-ION LXT CORDLESS INFLATOR

I have the batteries so cheap really at around £50-60. Can't fault it  Rangerover Sport 2016 4.4 sdv8 A/B loire blue.

Yep.....i have one of these, can't fault it, helps if you already have their other tools/batteries

WORX WX092.9 Battery Compressor - 4 in 1 2015 L494 SDV6 3.0 HSE Loire Blue
2006 L320 4.2 Supercharged - Gone
2009 BMW X5 M-Sport - Gone
2007 L320 2.7TDV6 SE Buckingham Blue - Gone
2011 Jaguar XFS 3.0V6 Diesel - Gone
2009 (59) L320 Facelift 3.0TDV6 HSE White Wrap - Gone
2008 BMW X5 M-Sport - Gone
2005 Audi A6 3.2V6 Quattro S-Line - Gone

Most of us have battery power tools of some sort and it seems there are an increasingly large number of firms making tools that are compatible. There are even converters on the market.
As I tend to favour De-Walt, I have a couple of 18V batteries supplied with my drill, so a De-Walt compatible compressor was an easy choice.

The £400 option looks nice and I'm sure it works brilliantly, but it does require hanging on a wall, wiring into the mains and having an air pipe, long enough to reach the vehicle trailing out of it, so from a simple domestic convenience perspective, a small, portable hand held, battery powered box with a short pipe coming out of it, has a something of an advantage. Being 1/10th of the cost is just an added bonus.

I actually have a full size compressor in the garage but dragging the 30m air hose off its roll, plugging it in, getting the tyre inflator out of its box, plugging that in the other end of the hose, and then connecting the compressor to the mains and waiting for it to build up pressure, is a bit of a faff when all you want to do is add a few psi to a tyre. Not to mention putting it all away again when I've done.
Grab the pump off the shelf, clip the battery on and it's ready to rock. No wires to trip over, no long hosesto mess about with, no ciggie lighters plugs to fiddle with, wires to move around when you're swapping sides. Just easy, carry it around as you go and it's all self contained - and, critically, only £40!

I looked at battery pumps a few years back but the batteries didn't last and they didn't have the power so I decided against. But with modern 18v batteries, they're finally worth a go, and not having to buy a battery specifically makes it a much better option. 2021 L494 D300MHEV Autobiography
2019 Discovery Sport D180 HSE

Last edited by 41jules1967 on Wed Aug 06 2025 4:08pm. Edited 4 times in total

I have a pressure gauge and a compressor that runs off the cigar lighter. All in for less than £50.

It lives in the space under the off side rear passenger seat along with a bag of cable ties and assorted bits and bobs. The space under the larger part of the rear seat contains jump leads, a fire extinguisher and tow ropes and small ratchet straps (for load securing in the boot if necessary). 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

When winter arrived last year, all 4 tyre warnings went off on my Jag as I was driving to the dealer for warranty work (or was it a security update.)

So I wouldn't say there was loads of tolerance!

Anyway, they put some fresh air in for me, without charge