I noticed that BLIS was late in activating. I came to a self-realization that my rear sensors for safety features probably needed to be re-calibrated after some body work a few weeks prior.
I had the lower rear valance professionally replaced (due to a “dufus” mistake on my part when hooking up my utility trailer).
I could recall that BLIS seemed late in activating. BLIS would only activate when an overtaking car’s front bumper in the next lane over came up adjacent to my rear bumper.
My light bulb came on that I should see if a re-calibration was needed for my safety systems, park assist, et al. The answer was yes and now it all works as expected.
All the best from Minnesota USA,
A fine MY16 XC90 T8