Tire Check Warning
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Super Member
Joined: Oct 2017
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2021 M550i
Tire Check Warning
Has anyone ever received a tire warning sign when their tire pressure looks fine?
My tire's air pressure has always been anywhere from 36 to 40 PSI (i keep all 4 tires the same psi) during the past 10 months of ownership, but this evening i had a check tire sign show up on both of my front two tires only at 38 psi.
I drove 10 miles since then and all seems good. However, I did reset the tire pressure to accept the current tire pressure of 38 for the warning to go away.
Had a good amount of Benzes but I never had to reset the tire pressure.... especially just on the 2 fronts.... wondering if it was just a TPMS glitch?
My tire's air pressure has always been anywhere from 36 to 40 PSI (i keep all 4 tires the same psi) during the past 10 months of ownership, but this evening i had a check tire sign show up on both of my front two tires only at 38 psi.
I drove 10 miles since then and all seems good. However, I did reset the tire pressure to accept the current tire pressure of 38 for the warning to go away.
Had a good amount of Benzes but I never had to reset the tire pressure.... especially just on the 2 fronts.... wondering if it was just a TPMS glitch?
MBWorld God!
Joined: Dec 2019
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Has anyone ever received a tire warning sign when their tire pressure looks fine?
My tire's air pressure has always been anywhere from 36 to 40 PSI (i keep all 4 tires the same psi) during the past 10 months of ownership, but this evening i had a check tire sign show up on both of my front two tires only at 38 psi.
I drove 10 miles since then and all seems good. However, I did reset the tire pressure to accept the current tire pressure of 38 for the warning to go away.
Had a good amount of Benzes but I never had to reset the tire pressure.... especially just on the 2 fronts.... wondering if it was just a TPMS glitch?
My tire's air pressure has always been anywhere from 36 to 40 PSI (i keep all 4 tires the same psi) during the past 10 months of ownership, but this evening i had a check tire sign show up on both of my front two tires only at 38 psi.
I drove 10 miles since then and all seems good. However, I did reset the tire pressure to accept the current tire pressure of 38 for the warning to go away.
Had a good amount of Benzes but I never had to reset the tire pressure.... especially just on the 2 fronts.... wondering if it was just a TPMS glitch?
Thread Starter
Super Member
Joined: Oct 2017
Posts: 882
Likes: 110
2021 M550i
thats the odd part. i was at 38 all around when only the 2 fronts turned yellow/orange and the check tire pressure came on. and to answer your question i am still on factory run-flats and staggered.
i got nervous thinking i might have popped only my 2 front tires, but i drove at least 10 miles back home without the pressure going down. even though these are run flats, i believe the tire pressure will start decreasing even though i am able to drive on them..
the warning sign disappeared after i reset the pressures. so wondering if it was just a glitch.. if 38 is what triggered it, it should have triggered all 4 tires...
i got nervous thinking i might have popped only my 2 front tires, but i drove at least 10 miles back home without the pressure going down. even though these are run flats, i believe the tire pressure will start decreasing even though i am able to drive on them..
the warning sign disappeared after i reset the pressures. so wondering if it was just a glitch.. if 38 is what triggered it, it should have triggered all 4 tires...
Out Of Control!!
Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
Just to clarify, there is not a specific pressure at which the TPMS alerts. It depends on the pressures that were stored the last time TPMS was reset. Your dealer may have put more air in at one point and reset TPMS, so 38 was "underinflated" based on the stored pressures. I always tell the dealership and my indy to not mess with my tire pressure. None of them seem to be able to get it right. They either fill it to the max pressure or check it when the tires are still warm and then the cold pressure is off. It's best to always check the tire pressure yourself and reset the TPMS, so it has your correct pressures stored as reference.
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Super Member
Joined: Oct 2017
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2021 M550i
Just to clarify, there is not a specific pressure at which the TPMS alerts. It depends on the pressures that were stored the last time TPMS was reset. Your dealer may have put more air in at one point and reset TPMS, so 38 was "underinflated" based on the stored pressures. I always tell the dealership and my indy to not mess with my tire pressure. None of them seem to be able to get it right. They either fill it to the max pressure or check it when the tires are still warm and then the cold pressure is off. It's best to always check the tire pressure yourself and reset the TPMS, so it has your correct pressures stored as reference.
Out Of Control!!
Joined: Nov 2018
Posts: 11,467
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From: San Francisco Bay Area
2019 C63CS
in my original post, it mentions that during the past 10 months of ownership my my tire pressure fluctuated anywhere from 36 - 40. Even yesterday i started out at like 36 but the alert came on at 38. So i do not think its the 38 that triggered it. do you think it was just a glitch? hopefully i dont have 2 flat tires when i go go to my car at some point today lol!
Last edited by superswiss; Jul 2, 2021 at 12:38 PM.
Thread Starter
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Joined: Oct 2017
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2021 M550i
Well, not knowing if the correct tire pressures were set from the beginning it's hard to tell. If you never reset the TPMS yourself in the past 10 months, then basically you don't know what it thought the correct tire pressures were. It's certainly possible that it was a glitch. These sensors can also fail for various reasons. You probably know that you can display the current tire pressures in the instrument cluster, so you can keep an eye on them and make sure they seem plausible. The sensors are not the most accurate, though. They only have a 1 psi resolution. So they are ok for a piece of mind, but regularly checking your tire pressure with a good gauge should not be avoided. I check mine every two weeks and keep an eye on the pressures in the instrument cluster between that. If it doesn't happen again moving forward and regularly checking of your tire pressures doesn't show any anomalies, then it probably was just a fluke. Just make sure you check your tires when they are cold. Car should be parked at ambient temperature for at least 3 hours and not be driven more than a mile before checking them, and then reset TPMS so that the proper reference pressures are stored. Keep in mind that the pressures change with ambient temperature as well. Every 10F change in temperature is 1 psi change in pressure, so regularly checking will also compensate for temperature fluctuations.
haha i am ocd with the tire pressures and i leave the tire pressure screen on 100% of the time on my dash. never once during the 10 months did i reset them either.
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MBWorld God!
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thats the odd part. i was at 38 all around when only the 2 fronts turned yellow/orange and the check tire pressure came on. and to answer your question i am still on factory run-flats and staggered.
i got nervous thinking i might have popped only my 2 front tires, but i drove at least 10 miles back home without the pressure going down. even though these are run flats, i believe the tire pressure will start decreasing even though i am able to drive on them..
the warning sign disappeared after i reset the pressures. so wondering if it was just a glitch.. if 38 is what triggered it, it should have triggered all 4 tires...
i got nervous thinking i might have popped only my 2 front tires, but i drove at least 10 miles back home without the pressure going down. even though these are run flats, i believe the tire pressure will start decreasing even though i am able to drive on them..
the warning sign disappeared after i reset the pressures. so wondering if it was just a glitch.. if 38 is what triggered it, it should have triggered all 4 tires...
No problem constantly checking your temperature on the TPMS screen at all, the tires are what connects you and your vehicle to the road so it is natural that you want to make sure they are in good shape. I still check mines manually for peace of mind because when you want to have a job done right, doing it yourself will guarantee that. TPMS is considered as a driver's assistance technology as it part of the ADAS family after all.
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Thread Starter
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Joined: Oct 2017
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2021 M550i
