[Paladin1]

Originally Posted by Barry123

I haven't rotated or replaced tires yet. Does (or should) the car automatically determine the new location of each tire for the purpose of the TPMS readings?

Yes - BMW's system (like Jeep and many others) uses the TPMS signal differences and timing to determine the location of the sensors - requires driving so the system can locate the sensors (hence the reset).

[mnx5er]

Originally Posted by Paladin1

If you were relying on the "automatic" recognition setting in TPMS, that might be your problem. Your car doesn't "automatically" recognize the type of tires it's wearing, for any tire. It has no capability to do this. What it does recognize, is if anyone - dealer or factory - has scanned the QR code (if it has one) on the side of the tire and transmitted it to the car's OS, which will then remember it "automatically." That's the extent of "automatic" recognition. If the tire doesn't have a QR code, or it hasn't been scanned in, the car has no idea what type of tires are on it and you'll need to use the Manual selection to add your tire(s).



https://www.tractionnews.com/qr-code...4jet-scannect/

That might - or might not - resolve the problem, however from the now available pic, it might be a problem with the software which has been identified before (at least abberent reports for tire psi - as in hundreds of psi). If adding the tires manually doesn't work, you might try a hard/diagnostic reboot of iDrive (which is not the same as a normal reboot - in the car, foot off the brake, rapidly press the Start button 3x - this will show a popup window on the IC advising that you are in Diagnostic Mode. Hold down the Volume Scroll Wheel until the main screen goes blank, release the scroll wheel, wait for the screen to come back, exit and lock the car, wait an hour, then come back and check again.

Sadly no luck.

I manually set the tires, that didn’t not fix it. Then did the hard reboot, that also did not fix it.

My “free” rotation from Discount Tire now turns into a bill from my BMW dealer to fix this. I think I am out of options.

[Paladin1]

Originally Posted by mnx5er

Sadly no luck.

I manually set the tires, that didn’t not fix it. Then did the hard reboot, that also did not fix it.

My “free” rotation from Discount Tire now turns into a bill from my BMW dealer to fix this. I think I am out of options.

Sorry to hear it (and I'm assuming you did check the tire pressure manually). Those were the easy options (and again, a hard reboot may take awhile to completely resolve) - also the more unlikely possibility of faulty or damaged sensors (more than one even more unlikely), or a problem with the TPMS software itself (less likely), or a hardware problem with the in-car receiver(s) (hopefully not). Your dealer can run diagnostics and sort it out, but the minimum check should be checking the sensors in all 4 tires I would think. The dealer can swap tires to see if the problem follows the tire - in which case it's the sensor - if not, it's the receiver. Could be as simple as a failing sensor battery.
Unfortunately sometimes "free" is a more expensive option for these complex systems.

[Paladin1]

Giving it some thought, another possibility not discussed comes to mind. If your car is equipped with an air suspension, this should generally be disabled prior to rotating the tires - in the iX you do this by pressing and holding the Suspension button on the center console until it flashes - about 5-10s. This is because the suspension tries to level the ride height, and not disabling it can (potentially) cause problems when manipulating the tires. It's almost a certainty that Discount Tires didn't do this. Just a potential problem, because resetting the TPMS should resolve and the suspension system is re-activated when driving the car, but it could theoretically cause a problem. As an aside, and always a personal choice like changing your oil earlier than the recommended intervals, BMW hasn't recommended tire rotations on any of its xDrive models for a number of years, for a number of reasons - at the least, it probably doesn't save any money and it (temporarily) affects handling.

[mnx5er]

I do not have the air suspension.

I’ve owned a bunch of BMWs and have never rotated the tires. I had measured my iX tires since it chews them up pretty good and figured a rotation would get me another 5K or so. Since I had the “free” rotation, I figured I would try it.

I’ve been kicking myself since I did it. Never again!

Appreciate all your help.

[ggalanis]

Originally Posted by mnx5er

I do not have the air suspension.

I’ve owned a bunch of BMWs and have never rotated the tires. I had measured my iX tires since it chews them up pretty good and figured a rotation would get me another 5K or so. Since I had the “free” rotation, I figured I would try it.

I’ve been kicking myself since I did it. Never again!

Appreciate all your help.

I didn't see you confirm to Paladin1 that you actually checked the pressures manually to confirm....
If you didn't so that, the most likely cause is that they rotated your tires (incorrectly as mentioned before by ricerboi ) and assumed the pressures were the same all around and didn't adjust them. Basically your previous rear tires are now on the passenger side and that the car is showing you correctly that they are at higher pressures than the driver side.

To confirm easily, simply start letting some air out of your front passenger tire and see which tire on your screen starts dropping in pressure.

[Paladin1]

Everyone should have one of these in their car, and use it at least every couple of weeks, TPMS or not:

[Barry123]

Originally Posted by Paladin1

As an aside, and always a personal choice like changing your oil earlier than the recommended intervals, BMW hasn't recommended tire rotations on any of its xDrive models for a number of years, for a number of reasons - at the least, it probably doesn't save any money and it (temporarily) affects handling.

On a semi-related note, on my Model S, I had several sets of Nokian tires, installed by Discount Tire. They told me that Nokian is very strict about adhering to recommended tire rotation in order to honor their tread wear warranty.

[ricerboi]

Originally Posted by Paladin1

Giving it some thought, another possibility not discussed comes to mind. If your car is equipped with an air suspension, this should generally be disabled prior to rotating the tires - in the iX you do this by pressing and holding the Suspension button on the center console until it flashes - about 5-10s. This is because the suspension tries to level the ride height, and not disabling it can (potentially) cause problems when manipulating the tires. It's almost a certainty that Discount Tires didn't do this. Just a potential problem, because resetting the TPMS should resolve and the suspension system is re-activated when driving the car, but it could theoretically cause a problem. As an aside, and always a personal choice like changing your oil earlier than the recommended intervals, BMW hasn't recommended tire rotations on any of its xDrive models for a number of years, for a number of reasons - at the least, it probably doesn't save any money and it (temporarily) affects handling.

Air suspension disable doesn’t matter. I’ve never had my tire shop do it and I’ve swapped wheels like 25 times during ownership (winter set and daily set). I have them mark on the tires the original position so I don’t rotate when I don’t need it.

You really need to only rotate once during the life of each set. I would run from new until tears are around 50-60% and then cross rotate. Unless you have some irregular wear, I find that the iX50 wears L/R pretty evenly without any significant camber wear issues and will wear rears about 1.5-1.8x the fronts.

For TPMS issue I had that before. Just have your tire shop reprogram the sensors. They should either do it for free or max $15-20 per wheel. Takes 5-10 min. I’ve run 2 new sets of aftermarket TPMS’s and watched them do it. It’s not hard, and shouldn’t be expensive. You don’t need to go to BMW dealer to do this.

[mnx5er]

Originally Posted by ggalanis

I didn't see you confirm to Paladin1 that you actually checked the pressures manually to confirm....
If you didn't so that, the most likely cause is that they rotated your tires (incorrectly as mentioned before by ricerboi ) and assumed the pressures were the same all around and didn't adjust them. Basically your previous rear tires are now on the passenger side and that the car is showing you correctly that they are at higher pressures than the driver side.

To confirm easily, simply start letting some air out of your front passenger tire and see which tire on your screen starts dropping in pressure.

Thanks. They did rotate them correctly. I checked that first. I also have manually checked the air pressure.

[ggalanis]

Originally Posted by mnx5er

Thanks. They did rotate them correctly. I checked that first. I also have manually checked the air pressure.

Ok then disregard my comment.
Good luck!

[NomoTesla]

If wear is even across the tire, rotation is not needed. Waste of time and subjects the car to potential damage with all the crazy action going on at tire shops. Requiring rotation as a term of the warranty is there not because it's actually needed, but to give a reason for denial.