[Balr14]

I keep getting a message asking me to check my TPMS "at my convenience". I have checked several times and tires are all 31 - 32 psi. I verified tire pressure reading were accurate with my trusty Milwaukee Tool tire inflator. Is there some reason for this message before I reset it?

[dholaday]

What does your car say is recommended tire pressure? Mine is 33.9psi all around. Maybe being a couple of pounds off is message cause?

[BEAR-AvHistory]

Originally Posted by Balr14

I keep getting a message asking me to check my TPMS "at my convenience". I have checked several times and tires are all 31 - 32 psi. I verified tire pressure reading were accurate with my trusty Milwaukee Tool tire inflator. Is there some reason for this message before I reset it?

Do the reset. You need to tell the system what the door placard says.

[Balr14]

Thanks for the replies. I did the reset. Does everyone follow the recommended tire pressures shown on the door? I ask because on my Porsche (997.2S) everyone ran 3 - 4lbs less.

[ebirotedu]

I use the in-car TPMS monitor system as a guide, and it usually recommends 31 or 32 PSI cold at startup.

During a drive the actual pressure tracks to recommended values better if I start at 31 PSI cold at startup - at 32 PSI they're more likely to go 1-2 PSI out of the recommended range once they heat up, especially on a hot day.

And I get kind of OCD when the actuals exceed recommended.
But only because I think 31 PSI cold is a good compromise between performance, comfort, and fuel economy in the Z4 and the in-car monitor seems to know where that sweet spot is.

I've always run slightly lower tire pressures on my motorcycles though for the sake of improving grip.

Originally Posted by Balr14

Thanks for the replies. I did the reset. Does everyone follow the recommended tire pressures shown on the door? I ask because on my Porsche (997.2S) everyone ran 3 - 4lbs less.

[Westside Guy]

Originally Posted by dholaday

What does your car say is recommended tire pressure? Mine is 33.9psi all around. Maybe being a couple of pounds off is message cause?

The manual recommends 32 degrees when cold for the M40i with the 19 inch tires.

If you are driving over 100 mph it recommends 38 pounds.