Tire Pressure Loss
 

wassap guys my idrive keeps telling me flat tire i check air pressure every things fine it keeps giving me that message after i reset it comes back like 5 days or a week later i took all the tires off checked for leaks and holes nothing

If you have TPMS maybe one of them is going bad?

actually i dont your talking about sensors right?

same thing happening to me. I have FTM. Any ideas before I go to BMW?

could be the cold weather....

also helps if you state if you have tpm's or ftm's...if you have tpm's..as stated above, might have a bad sensor..

perhaps one of your rims are bent of damaged...did you hit a pothole recently...that could be a cause for pressure loss also....

If it is tpms check to make sure your valve stems are correctly torqued (30 in/lbs for beru's). I kept getting a low tire pressure warning that was from a slow leak due to a loose valve stem.

That's very common - esp with TPMS the gaskets can leak or the valve insert became loose. Rim leaks are not uncommon either.

The best way to check is to inflate the tires to 40-50-60 psi (never exceed the max pressure marked on the sidewall) and use a water bath and look for bubbles. Any time I've had this issue and used a soapy spray to find it but couldn't the water bath did.

+1

The dunk tank is the best way to find those leaks. I just got lucky on my guess not to mention I also wanted to try out my new cdi torque wrench. :D