newone88

Hi, I have 2013 ES300h with 15k on it. Around 3k I noticed the tire pressure sign on and my from right tire would lose pressure after couple of weeks. When I took it for the 5k services, they did not find anything wrong with the tires. Again around 7k miles I notice the light again an now I see that the back left tire losing pressure. Again, after the 10 km maintenance, they said the tires are fine.
Then the from left one started to lose pressure and at the 15k maintenance, they told me the tires are fine. This morning the light came on again with the front right tire showing it has less air than the rest.
Any idea what is going on? I don't think it is a tire issue because it is not always the same one and the dealer did not find any issues with any of the tires.
of course when I fill the tire with air the light goes away for couple of weeks.

Aziz

mspearl95

Use a spray bottle with some soapy water to spray down the affected tires, and see if there are any pinhole leaks. Do it both cold, and after when you've been driving for a bit, when the pressure is up.

newone88

Will do. The dealer checked all the tires and did not find any leaks as they told me and that what is bothering me.
Cheers.

Mike728

Are you getting tire rotations during all those services? Might be the same tire. Also, how low is it reading?

Nelexus88

Keep in mind the dealer is supposed to be rotating the tires every 5k service, so is it possible the same tire may be causing the low alarm due to it being switched to a different corner? Some slow leaks are difficult to locate and it may take a bit of work to find it. You may have to take it to a tire dealer who is more experienced at finding leaks.

lesz

I'm not sure that I understand. Are the tires actually losing air pressure? Or is the tire pressure monitoring system malfunctioning and incorrectly reporting that the pressure is down when, in fact, the tires have not lost any pressure?

newone88

Yes, they did the tire rotation and it might be the same tire.
Again, they looked at it few times and they said they could not detect any leaks.
It drops around 28 when the light comes on and after I fell it, then it is fine for a couple of weeks.
It might be small leak that they just did not see. They told me my tires are still in good shape (70%).
I will take it to the shop next to me and see if they can find the leak.
Thank you all for the help.
Cheers

SLH

I have had screws embed themselves in the tread of a tire, such that they lose air-pressure at the rate of a pound a week.... If the head breaks off, the only way to find them is the soapy-water test. It is important to find it and get it repaired, before you have a sudden fully-flat tire. A pound-a-week leak can turn into a fast leak (and a fully flat tire) at any time.

The tire-pressure-monitor system (TPMS) does not reliably tell you which corner the low-pressure tire is on. The TPMS transmitters are identified by serial number. They get moved (with the wheel) during each tire-rotation, but techs often do not reprogram the computer with the new positions...

When one tire is several pounds lower than the other three, you can use a tire-pressure gauge to figure out which one it is. Then soap-water-test that one to figure out how the air is getting out. Then, of course, have a tire-service shop fix it.

Mike728

If this is the case where you go, I would say something.

chromedome

Most likely there's a leak in that tire. I went for a week-long trip up to the mountains and along the way, I noticed one tire having a slight drop in pressure. It stabilized and eventually all the tires got up to the same pressure with the heat.

After coming back, that same tire kicked up a TPMS warning just as I was heading out in the morning. Turns out a small nail had become embedded in the tire and slowly twisted around until a major leak happened. I keep a tire gauge in the glove box just in case the TPMS acts funny.

wasjr

Somebody may have mentioned this, but cold weather will cause tire pressure to drop. The TPMS light in my wife's 300h came on a couple of weeks ago and one tire was registering 29 lbs. A couple of days later when the temperature went back up, the the pressure in that tire read 31 lb, and the light went off.

Kusala

I find the NX silent with a capital S even with run flats. Perhaps it's because I've been driving German sports sedans for so long, but I like them and wouldn't consider a different tire to reduce another decibel of road noise or squeak out an additional 1 KM of EV range.

These tires also provide me the peace of mind knowing that if my wife gets a flat she can continue to drive.