2011 Ford Edge 18in wheel oxidation on rim bead video

[macbwt]

This video shows what I suspected and confirmed. The inside wheel bead was leaking. The reason for the leak was due to oxidation of the rim between the wheel and the tire bead. The oxidation eventually increased in enough amounts to allow air to seep out of the tire and cause the tire to loose enough air over about a two week time frame to activate the TPMS for a low tire. This video show the oxidation and the repair to the rim and tire to reseal it.

[macbwt]

Follow up: No loss of air pressure noted after one week. The fix appears to be working.