Tyre Pressure Warnings - Looks Wrong

[bad company]

I have a 2024 440 MSport so model G22 (I think).

I keep getting tyre pressure warnings and the car’s systems seem to be wrong. I’ve inflated all 4 tyres to the recommended pressure. I’ve checked the accuracy using 3 separate compressors but I’m still showing the readings as below. Is this something I can correct or do I need to book the car into BMW?

Any help appreciated.

[Tymb]

After you have set the pressures to the correct value you probably need to go into a tyre settings menu and do a calibration.

[bad company]

Tymb said:

After you have set the pressures to the correct value you probably need to go into a tyre settings menu and do a calibration.

Done that, it’s still showing incorrect pressures. Worked like that on older models.

[bigdom]

Compressors do vary. Really needs checking with a tyre pressure gauge. My compressor, tyre gauge and tpms never align.

[8Tech]

If you increase the pressures temporarily to 3 bar, does the display change? If not, you have a communication error. You may also need to drive the car at least 5 miles for the sensors to reset.

[bad company]

8Tech said:

If you increase the pressures temporarily to 3 bar, does the display change? If not, you have a communication error. You may also need to drive the car at least 5 miles for the sensors to reset.

Thanks, I’ll try that.

[Nic-nfr74]

drive it after the re calibration

It needs to ' see ' rotation for a few miles

[Doesitdrive]

Nic-nfr74 said:

drive it after the re calibration

It needs to ' see ' rotation for a few miles

This, reset after driving.

[danb79]

bad company said:

I have a 2024 440 MSport so model G22 (I think).

I keep getting tyre pressure warnings and the car s systems seem to be wrong. I ve inflated all 4 tyres to the recommended pressure. I ve checked the accuracy using 3 separate compressors but I m still showing the readings as below. Is this something I can correct or do I need to book the car into BMW?

Any help appreciated.

As others have said; into iDrive, reset tyre pressures and then drive the car, it'll go from 0 to 100% whilst you're driving and that should be it done

FWIW I use this when I check tyre pressures on both my E39 and our F31: https://www.amazon.co.uk/Draper-69924-Pressure-Gau...

It's hell of a lot more accurate compared to my Ryobi cordless tyre inflator; and my RING tyre inflator

When I look at the tyre pressures on the F31s iDrive they're all different; even though the Draper tyre pressure gauge says that the fronts are the same, and the rears are the same etc

[Pica-Pica]

danb79 said:

As others have said; into iDrive, reset tyre pressures and then drive the car, it'll go from 0 to 100% whilst you're driving and that should be it done

FWIW I use this when I check tyre pressures on both my E39 and our F31: https://www.amazon.co.uk/Draper-69924-Pressure-Gau...

It's hell of a lot more accurate compared to my Ryobi cordless tyre inflator; and my RING tyre inflator

When I look at the tyre pressures on the F31s iDrive they're all different; even though the Draper tyre pressure gauge says that the fronts are the same, and the rears are the same etc

Assuming it works like an F30/1.
I find my F30 starts off with one side different to the other (which side depends on whether the sun is shining or it's cold) but after 20 miles the on screen pressures show both sides the same. Also the screen shows thaat WARMED setting as the same as the COLD tyre gauge setting from a hand gauge. My old Halfords digital hand gauge reads the same as my new TireTek analogue hand gauge.

[E-bmw]

Whilst I know that most manufacturers these days give & expect tyre pressure to be in Bar it is frequently not accurate enough for the actual systems.

1 bar + 14.5 PSI, convert into PSI & set all correct to the desired pressure it will frequently help with "mis-reporting" of alarms, although I do see that this may not be your issue.

The reason this frequently helps is as follows.

Most digital gauges only go to 1 decimal place.

0.1 bar is 1.5 psi

0.1 psi is 0.007 bar

After setting the system needs to be reset & driven to accept the new settings as others have said.

[stewart rix]

You may have to also go into the tyre selection menu - set the tyre type manually as Summer (I can't recall whether the size is also required)

[bad company]

OK so I took the car out for a few miles and did the reset on the cars app. Still showing under pressure and the recommended has reduced from 2.5 to 2.4 bar.

I’ll increase the pressures when I get home and try again.

[danb79]

bad company said:

OK so I took the car out for a few miles and did the reset on the cars app. Still showing under pressure and the recommended has reduced from 2.5 to 2.4 bar.

I ll increase the pressures when I get home and try again.

Get a pressure gauge first and see what the actual pressures are, rather than relying on the TPMS etc

Then see how you get on manually adjusting them

[Pica-Pica]

danb79 said:

Get a pressure gauge first and see what the actual pressures are, rather than relying on the TPMS etc

Then see how you get on manually adjusting them

Can recommend these, I have tested it against other gauges and it reads the same. It is also one of the easiest and most comfortable to use.

[edthefed]

bad company said:

OK so I took the car out for a few miles and did the reset on the cars app. Still showing under pressure and the recommended has reduced from 2.5 to 2.4 bar.

I ll increase the pressures when I get home and try again.

Recommended pressures change owing to various conditions - tyre temperature / speed / weight being carried etc

TPMS is not infallible on my G30 one of the sensors always read 2psi below what the actual pressure was

[Pica-Pica]

edthefed said:

bad company said:

OK so I took the car out for a few miles and did the reset on the cars app. Still showing under pressure and the recommended has reduced from 2.5 to 2.4 bar.

I ll increase the pressures when I get home and try again.

Recommended pressures change owing to various conditions - tyre temperature / speed / weight being carried etc

TPMS is not infallible on my G30 one of the sensors always read 2psi below what the actual pressure was

I am surprised. My 9 year old F30's TPMValves have survived a wheel set swap and still read and respond accurately.

[bad company]

UPDATE.

Inflated all 4 tyres to 2.5 and did the reset. Everything seems ok now though the car’s system is saying the pressure should be 2.4 which is close enough .

Thanks for the help guys.

[Pica-Pica]

bad company said:

UPDATE.

Inflated all 4 tyres to 2.5 and did the reset. Everything seems ok now though the car s system is saying the pressure should be 2.4 which is close enough .

Thanks for the help guys.

As in my earlier post, I find that when the tyres get up to temperature the screen TPMS shows the SAME as a COLD hand gauge setting. Ultimately, when close to the specified pressure, I adjust for ride comfort and feel.

[Night Owl]

Pica-Pica said:

bad company said:

UPDATE.

Inflated all 4 tyres to 2.5 and did the reset. Everything seems ok now though the car s system is saying the pressure should be 2.4 which is close enough .

Thanks for the help guys.

As in my earlier post, I find that when the tyres get up to temperature the screen TPMS shows the SAME as a COLD hand gauge setting. Ultimately, when close to the specified pressure, I adjust for ride comfort and feel.

In my experience TPMS reads .2 bar too low.

I use a hand gauge and always set the tire option in the menu to "other tires," since I run warm settings of 2.4-2.5 bar on the road for better grip and handling.