(ADAS) R WAVE RADAR SENSOR/BLIND SPOT WARNING SENSOR. NO WARNING FOR THE STATIONARY OBJECT (TREE) BEHIND MY VEHICLE CAUSING A COLLISION. A REPORT WILL BE MADE TO THE SUBARU DEALERSHIP ONCE THE VEHICLE IS REPAIRED BY THE COLLISION CENTER. INSURANCE ADJUSTERS HAVE REVIEWED. NO WARNING LIGHTS, OR ANY SIGNS OF ANY ISSUE UNTIL THE BLIND SPOT SENSOR FAILED TO PROPERLY WARN ME OF THE STATIONARY OBJECT.