[DNYC1919]

I have a 2021 540 xdrive with the 19 inch sport wheels and tires. All are same size and width.
I always thought the tire pressure should be same for all tires. When I took the car to a service a couple of months ago they made the tire pressure a lot lower in the front wheels then back wheels. And now when I go into the tire pressure screen recommendation it’s showing it should be lower in the front vs rear tires. Is that a error ?

[bryansna]

Tire pressure for specific models are listed on the door jamb of the drivers door. You should use that as your baseline

[DNYC1919]

Originally Posted by bryansna

Tire pressure for specific models are listed on the door jamb of the drivers door. You should use that as your baseline

Ok thanks. It’s just weird that the service dept changed it.

[DNYC1919]

Originally Posted by bryansna

Tire pressure for specific models are listed on the door jamb of the drivers door. You should use that as your baseline

Im a rookie. It does show different amounts for front and rear on door jamb. Thanks.

[AP]

That’s obviously for cold tyres
I use the idrive display which compensates for temperature so if the tyre is warm, it’s recommended pressure takes that into account

I have a shortcut button asdhh in gamed to that so I can check the pressures every journey

If the ambient temperature changes significantly ( keep an eye on the weather) then you will probably habe to adjust your pressures

This will all ensure that you get the best and even wear out of tyres especially if you have run flats , thes mask under inflated tyres very well!

[cna90]

Originally Posted by DNYC1919

I have a 2021 540 xdrive with the 19 inch sport wheels and tires. All are same size and width.
I always thought the tire pressure should be same for all tires. When I took the car to a service a couple of months ago they made the tire pressure a lot lower in the front wheels then back wheels. And now when I go into the tire pressure screen recommendation it’s showing it should be lower in the front vs rear tires. Is that a error ?

Due to the battery weight in the trunk along with how bmw distributes power, rears are higher in pressure to accommodate.

[BMW012]

for my 21 m550 the recommended is 38 in the front and 35 in the rear, if i recall correctly. back is less than the front for sure. the odd part is for 2018 m550i they recommend the front to be higher.

I would just go off the door label.

[AP]

My idrive is currently recommending 42psi all round with ambient temp around 10c

This is a bit higher than my previous 540

[bryansna]

Sorry, should have mentioned cold temp. I check it before moving and adding energy into the tire. Also, 2020 has 41 front and 44 rear.

[jsf721]

My 2019 with 19”’m sport 664 rims and they call for 38 lbs up front and 43 in the rear.

[G30M]

Originally Posted by BMW012

for my 21 m550 the recommended is 38 in the front and 35 in the rear, if i recall correctly. back is less than the front for sure. the odd part is for 2018 m550i they recommend the front to be higher.

I would just go off the door label.

interesting. heavy front eh.

mine is minimum 42PSI on the door! up to 50+ when loaded!
(20" RFTs)

[G30M]

Originally Posted by BMW012

for my 21 m550 the recommended is 38 in the front and 35 in the rear, if i recall correctly. back is less than the front for sure. the odd part is for 2018 m550i they recommend the front to be higher.

I would just go off the door label.

could you please post a picture of your door card and if you could tell us the tire size so I know what to do if i move away from these wheels?

[Mike 540]

I had the same question in my mind and when asked in BMW they said "go by the door sticker". This is to be understood as required pressure of cold tyres.