Tires deflate for no reason

L.A.S. · 11-07-2017, 04:18 PM

I couldn't find anything about this topic. Basically if I don't drive my car for a day or two they lose air pressure. I've had the car for 4 months and have had to fill my tires up 4 times. If anyone has experienced this issue or has an answer I would appreciate it.

JTK24 · 11-07-2017, 04:23 PM

i don't have this issue (knock on wood) on my F80, but my previous car had this issue and it drove me crazy. It gave me a low tire warning every other week basically.

I assume you have taken your car to a reputable tire shop to check for any leaks? Usually they can submerge the tire in water to check.

My previous car had run flats, which for whatever reason seemed to be the cause of that issue. As soon as I switched to non-RFTs, I never got a low tire pressure indicator again. I dont think M4's come with RFTs though, so this probably isn't applicable to you.

If the weather is fluctuating between hot and cold that can cause changes in pressure. Do you know if your tires are changing a material amount of PSI or just a small change that just falls under the TPMs limit? Is it just one tire or all four?

Good luck with the issue, hope you can solve it. It was downright maddening in my old car.

Signature Wheel BMW · 11-07-2017, 05:51 PM

There's always a reason.
50% chance (a nail, sometimes it's hard to see) and 50% chance (bad valve stem). Take it to Discount Tire or equivalent, they can check it for you.

Mr Pete · 11-07-2017, 10:14 PM

Yea, I agree, nail or bad valve stem. Im currently having an issue with a faulty valve stem, so I'm having to fill up my tires every 3 weeks. Thankfully, its not my daily. But its made me super lazy to get it addressed, as I just fill up in the garage and off I go.

L.A.S. · 11-13-2017, 05:37 PM

Thank you everyone for your input. I think it may be a bad valve system because all of the tires deflate.

SakhirM4 · 11-13-2017, 05:53 PM

Quote:

Originally Posted by L.A.S.

Thank you everyone for your input. I think it may be a bad valve system because all of the tires deflate.

Bad valve system?

TheShaddix · 11-17-2017, 11:31 AM

One of my valve stems had a leak after the last tire shop visit. I sealed it with epoxy (in between the two metal parts of the stem). That is most likely where your leak is coming from if it's not a nail in the tire.

11-07-2017, 04:18 PM	#1
L.A.S. Enlisted Member 6 Rep 39 Posts Drives: 2017 M4 Join Date: May 2010 Location: San Diego iTrader: (0)	Tires deflate for no reason I couldn't find anything about this topic. Basically if I don't drive my car for a day or two they lose air pressure. I've had the car for 4 months and have had to fill my tires up 4 times. If anyone has experienced this issue or has an answer I would appreciate it.
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11-07-2017, 04:23 PM	#2
JTK24 Second Lieutenant 121 Rep 211 Posts Drives: F80 Join Date: Jun 2017 Location: CA iTrader: (1)	i don't have this issue (knock on wood) on my F80, but my previous car had this issue and it drove me crazy. It gave me a low tire warning every other week basically. I assume you have taken your car to a reputable tire shop to check for any leaks? Usually they can submerge the tire in water to check. My previous car had run flats, which for whatever reason seemed to be the cause of that issue. As soon as I switched to non-RFTs, I never got a low tire pressure indicator again. I dont think M4's come with RFTs though, so this probably isn't applicable to you. If the weather is fluctuating between hot and cold that can cause changes in pressure. Do you know if your tires are changing a material amount of PSI or just a small change that just falls under the TPMs limit? Is it just one tire or all four? Good luck with the issue, hope you can solve it. It was downright maddening in my old car.
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11-07-2017, 05:51 PM	#3
Signature Wheel BMW Major 1112 Rep 1,085 Posts Drives: Signature BMW Join Date: Sep 2016 Location: IG: signature_bmw iTrader: (0)	There's always a reason. 50% chance (a nail, sometimes it's hard to see) and 50% chance (bad valve stem). Take it to Discount Tire or equivalent, they can check it for you. __________________ Jimmy \| BMW Addict \| Signature Performance Wheels \| OBSESSED WITH PERFECTION \| IG: Signature_BMW \| Email: jimmy@signaturewheel.com
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11-07-2017, 10:14 PM	#4
Mr Pete Major 1617 Rep 1,002 Posts Drives: 997 GT3 4.1, Golf R (daily) Join Date: Aug 2014 Location: AZ iTrader: (1)	Yea, I agree, nail or bad valve stem. Im currently having an issue with a faulty valve stem, so I'm having to fill up my tires every 3 weeks. Thankfully, its not my daily. But its made me super lazy to get it addressed, as I just fill up in the garage and off I go.
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11-13-2017, 05:37 PM	#5
L.A.S. Enlisted Member 6 Rep 39 Posts Drives: 2017 M4 Join Date: May 2010 Location: San Diego iTrader: (0)	Thank you everyone for your input. I think it may be a bad valve system because all of the tires deflate.
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11-17-2017, 11:31 AM	#7
TheShaddix Second Lieutenant 80 Rep 204 Posts Drives: F80 M3 2017 Join Date: Aug 2012 Location: SoCal iTrader: (4)	One of my valve stems had a leak after the last tire shop visit. I sealed it with epoxy (in between the two metal parts of the stem). That is most likely where your leak is coming from if it's not a nail in the tire. __________________ Follow my IG @craft_tech For my car videos visit my YouTube Channel @TheShaddix
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