My BSMs have been acting up over the summer and noticed that the BSM light would flash and the monitors stopped working when the car sat in the hot sun for several hours. Otherwise, the BSM worked in the early morning or when the car was parked in a shaded area. So it appears that the BSM failures are temperature-related. Anyone here have the same problem? I saw where both units were located underneath the rear bumper and checked their connections to the wire harness. It all looks good.