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2020 Macan S
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It happened to me 3 weeks after I picked up the car, I went back to the dealer and they found a little tiny nail in the right rear tire. Dealer only replace tire but no patch, so I went to Discount Tire and get it fixed.

Look closely to your rear right tire, I'm sure there's something on there...
 

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Agree with Joyride 22.

Over inflation may well have been a factor in the road debris damage.

From Cars.com (emphasis added):

"Tires that are overinflated tend to wear faster in the center part of the tread because the center of the tread will bulge out when too much air is added. This will cause the center of the tire to carry more of the vehicle’s weight than the edges. Overinflation can also make the ride stiffer and reduce traction because the vehicle’s weight isn’t evenly distributed across the tire-to-road contact patch. Worse, it can make the tire more prone to blowouts and damage from potholes and road debris because the tire doesn’t flex as much as it normally could if it’s overinflated."
 

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Is this normal reading>?
I got an alert this am about the rear right being low? Not sure if its weather related or not.
Almost certainly a leak in that tire. My take is that the TPMS is accurate enough to indicate a low/flat tire and to approximate pressures, but I use a quality tire gauge when inflating them to insure consistent side-to-side pressures.
 

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I have to think TPMS adjusts for tire temperature. I frequently check that display, especially on long trips, and have never seen a reading that indicates an increase in tire pressure.
 

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2022 GTS
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You can trust the TPMS, but a tire pressure gauge is always good to have.
I picked up a nail (did not know at the time) right away after new GTS pick up. Used a $40 portable inflate pump, works of the cigarette lighter, to refill several times. Always slowly showed lost psi on TPMS display. Dealer confirmed. My thinking brand new car deserved a brand new tire, at $475.
 

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I have to think TPMS adjusts for tire temperature. I frequently check that display, especially on long trips, and have never seen a reading that indicates an increase in tire pressure.
It most definitely does not adjust for tire temperature. And literally every drive you should see an increase in tire pressure when your tires warm up at highway speeds. Something isn't right if you're not seeing that.
 

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Do I trust the TPMS or should I get a manual tire gauge tester?
What type is recommended?
I like the Jaco brand gauges. You can spend a lot more but the Jacos claim to be ANSI certified and their claimed accuracy matches the more expensive brands. I have used their analog gauge for a couple years and like it. My son lost his, so he'll get mine. I just ordered the Jaco digital gauge which claims to have a .5% rating.
BTW, my analog gauge matched the TPMS readings during the two weeks I've had my Macan. I have tested the air pressure in my tires several times to get them even from side to side at the right inflation specs.
Good luck with your tires. Good tires are very important and I too look forward to replacing my Pirellis with Michelin rubber.
 

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That's interesting, I've never seen that. I'll have my system checked.
It "depends" upon what you are looking at. If you are looking at the actual pressures, then they ALWAYS move. Just having the car sits in the sun, with one side in the shade, and once it reads, it will read different numbers on one side than the other.

OTOH, if you are looking at the +/- numbers, I believe that does show relative to 68 degrees.

So its both


And for tire gauge recommendations

 

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2020 Macan GTS
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Do I trust the TPMS or should I get a manual tire gauge tester?
What type is recommended?
I always carry a manual tire pressure gauge for emergencies but one of the best things I ever bought was a cordless tire inflator. Lots of different brands.

I have Makita cordless tools at home so I bought their version for battery compatibility. My dad has Milwaukee tools so I got him a Milwaukee one.

Haven’t been to a gas station air pump in years. My cordless one has a digital gauge so I just enter whatever tire pressure I want and go, it automatically stops when pressure is reached. Couldn’t be easier.
 
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