I put new tires on my 250 about 4 months ago. Since then, the left front has been losing pressure at about 2 lbs. per week. The others are all fine. I know there's a slow leak somewhere but I've tried everything to find it and I can't. Wheel has been soaped, immersed in water bath, remounted, valve stem replaced and no joy! I've been thinking of putting some fix-a flat in the tire as a last resort but I'm concerned about its affect on the TPMS sensor in the tire. Any thoughts or has anyone tried this???

 

I'm pretty sure it will screw up your TPMS sensors, I wouldn't use it.

Did they replace the TPMS seals? might be leaking from there.

 

Get you tire patched at a tire shop...

 

I wouldn't recommend using fix-a-flat for this. It will ruin the tire and should only be used in an emergency. And even in an emergency, people that do use this get this on the inside of their rims and it is usually a pain to remove. My recommendation...call a tire shop and verify that this information is correct. Hope this helps.

 

if it cold out it normal. if not take it to lexus if it the sensor. dont use fix a flat cause it not good for the sensor on your rims. if it flat that what your spare is for.

 

mine did that and it turned out to be a small nail in the tire.