2021 Bmw X5 Lane Departure Problems

This is a 2021 BMW X5 with BMW's blind spot warning system. The vehicle currently has approximately 5,500 miles and was purchased new. The blind spot warning system has consistently malfunctioned since the vehicle was delivered. When monitoring the right side (passenger side) blind spot it only picks up on average 1 of each 3 vehicles encountered and completely the ignores the the others. By "picks up" I mean the visual indication in the right side mirror is lighted when the vehicle is in the blind spot. For those the system does not detect there is no visual indication of the vehicle and if the right turn signal is activated there IS NO WARNING of the vehicle in the blind spot. This effectively renders this critical safety system completely useless and a serious safety hazard as it is clearly malfunctioning. Upon complaining, the X5 was inspected by the dealer who reported that no malfunction was found and the system "is functioning as designed". After additional discussion with the service manage the dealer verbally admitted the system was not detecting other cars on the right side of the vehicle consistently but as there was no electrical fault detected in the system, it must be OK and it was not a repairable issue. Assuming the dealer's analysis of the problem is correct, this leads to the conclusion there is a serious safety design flaw in BMW's blind spot detection system. A brief examination of various BMW related internet forums shows this issue, or very similar issues concerning the function and design of the BMW blind spot detection system have been reported by several BMW owners, suggesting the problem is likely a design flaw and not a simple component failure.

I was driving in the left lane of the freeway, and there was a k-rail to the left of the lane, because there was construction in the shoulder. At one point, there was a break in the k-rail, where it had an opening, and went away from the lane, then back about 20 ft later. The lane departure system jerked the wheel to the left, attempting to steer out of the lane; if I had not held the wheel steady, it would have steered the vehicle directly into the k-rail as it rejoined the side of the lane.