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Discussion Starter #1 (Edited)
Drove my car today and the tire pressure monitoring system (TPMS) light came on. I haven't checked tire pressure yet but I thought since I have nitrous in my tires that the pressure wouldn't vary. Anyone have any suggestions?
 

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The nitrous in the tires shouldnt matter. The q3 doesn't have TPMS sensors in the tires. The ABS computer is looking for a change in rotational velocity to determine pressure loss.

I would check and adjust your pressure to what you believe is true and then reset the system through the MMI and monitor it just to make sure you don't have a small leak in one tire.
 

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NOBODY has has nitrous in their tires - you may have NITROGEN, but that is an entirely different gas. And, while nitrogen pressured tires DO vary less than simple air, by virtue of molecular diffusivity, they are STILL subject to seasonal temperature/pressure differences that are usually triggered in any TPMS. Greater still, they are just as susceptible to every kind of hazard that can lead to a leak ...

Oh, and while ralfo is correct about TPMS sensors in the tires, the Q3 still has a TPMS, which works via the ABS sensors and measures differences in tire pressures. TPMS stands for Tire Pressure Monitoring System, and has NOTHING to do with exactly what method or sensors are used to do the monitoring of tire pressures ... just that is does it.
 

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OMG sorry guys, I meant to type Nitrogen. I would edit the post but it won't let me.

I have been monitoring the tires visually and the tires look fine.

I'll check one more time in the morning and then I'll reset the TPMS.

Is it necessary for me to do a physical check with a gauge?

Thanks for the help.
 

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OMG sorry guys, I meant to type Nitrogen. I would edit the post but it won't let me.

I have been monitoring the tires visually and the tires look fine.

I'll check one more time in the morning and then I'll reset the TPMS.

Is it necessary for me to do a physical check with a gauge?

Thanks for the help.
Do not do a visual check as you can easily have 5 PSI difference and not be able to see it (try it and see). Everyone should have a good tire gauge and check their tires monthly...
 
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Do not do a visual check as you can easily have 5 PSI difference and not be able to see it (try it and see). Everyone should have a good tire gauge and check their tires monthly...
The scary part is, when you reach single digits, that when it looks noticeable and that's when its dangerous.
 

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Discussion Starter #7
I bought a pressure gauge today. Tested all 4 tires and they all were reading 35 PSI

Although the sticker inside the door says that the front tires should be 40 and the rears should be 44.

Now what?
 

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The sticker should give you two pressure options higher for full load, lower for three passengers or less. (I set mine at the lower for more comfort) you can set yours as per your liking and reset you tpms via the mmi and you should be good. Note if you don't want to add nitrogen or mix with air, and are comfortable with the ride at 35psi just reset in mmi and you should be fine.
 

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Discussion Starter #9
Thanks for the update. I like the ride comfort at 35PSI, just didn't know I could drive at that PSI, since the sticker showed 40 and 45.
 

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What are the downsides to mixing nitrogen with air?
Nothing more than having air instead of nitrogen in the first place...
 
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Just a follow-up...I had the car in for 5k service today and they said the tires are fine and they simply reset the TPMS...hopefully it doesnt keep coming back on.
 

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Reseting the TPMS

How can I reset the TPMS. The manual I have is in German language. Can someone walk me through the steps or send me a link to an online manual
 

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How can I reset the TPMS. The manual I have is in German language. Can someone walk me through the steps or send me a link to an online manual
Does this help. My Q3 is in Florida and I'm in Pa or I would print/post the manual for you. I'm not sure if the video applies to the Q3. Regardless...check pressure and fill when tires are cold...have not been driven on.
And welcome to the forum.

https://www.youtube.com/watch?v=TNOr1c1TwYs
 

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Amal - Since I have no idea what exact car YOU have or even where you are to guess, this is not a generic question. The exact method depends on WHICH version of MMI you have based on optional equipment and that is in your manual - there are at least 3 methods for Q3s - so please check your manual for the correct method for YOUR car...

btw, the video above shows (approximately) ONE method -
 
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Amal - Since I have no idea what exact car YOU have or even where you are to guess, this is not a generic question. The exact method depends on WHICH version of MMI you have based on optional equipment and that is in your manual - there are at least 3 methods for Q3s - so please check your manual for the correct method for YOUR car...

btw, the video above shows (approximately) ONE method -
I have Q3 2015 (1.4L) I live in Cairo Egypt. The manual that I received with the car is in German language. I checked for online manual and couldn't find.
" Pressure Loss! Check all tyres and store pressure in MMI."
When I tried to navigate the menu, I got the following message:
"Note: MMI is switched off: operation not possible."

Also, I don't know what is the right pressure for my car, how can I find this info. I don't have a sticker on my door like the car in the video.

Thanks
 

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Okay Amal - I am not sure I can help, but will try. First, what tires do you have on the car, I assume because it's a 1.4, you probably have 16 or 17 inch tires, but maybe 18s. Anyway look in your manual's index at the back for "reifen" and check those pages for your tire size and pressures. If you cannot find a chart that include them, use the chart below which is the typical label for Q3s.



As for resetting the TPMS, again - look in your manual under "reifendrück" and see if you can find some pics of how to use your DIS (between your gages) and the signal stalk to reset the TPMS. Without MMI, you should be able to cycle thru your car's settings to find the "tyre..." section and pressure resets.

Sure hope this helps you out ... btw - WELCOME to the forum and glad you found us - please come back often and post pics of your car -
 

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Also - Amal, I run 44/46 psi (3.1/3.2 kg/cm2) in my Q3 and I have 19s with 255/40s ...
I like the increased responsiveness and lower rolling resistance (better economy) AND don't mind the slightly stiffer ride -
 

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I have Q3 2015 (1.4L) I live in Cairo Egypt. The manual that I received with the car is in German language. I checked for online manual and couldn't find.
" Pressure Loss! Check all tyres and store pressure in MMI."
When I tried to navigate the menu, I got the following message:
"Note: MMI is switched off: operation not possible."

Also, I don't know what is the right pressure for my car, how can I find this info. I don't have a sticker on my door like the car in the video.

Thanks
Can you email Audi(corporate) or is there an international number you can call?
 
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