NHTSA complaint #11763862

Owner complaint summary

Dear Sir/Madam, I am experiencing an issue with my BMW vehicle whereby, approximately 5 to 10 minutes after beginning to drive, the Driver Assistance System becomes disabled. As a result, both the Blind Spot Detection and Lane Departure Warning functions are deactivated, and a warning message indicating that driver assistance support is restricted appears on the display. I understand that BMW has previously issued Service Action B66 20 19, which recommends replacement of the KAFAS (Camera-Based Driver Assistance System) under certain conditions. Based on my research, the symptoms affecting my vehicle appear to be consistent with those described in that service action. However, when I checked my vehicle information, I was unable to find any open recall or service campaign associated with this issue. While driver assistance technologies are intended to supplement, rather than replace, attentive driving, these systems are nonetheless important safety features that contribute significantly to vehicle safety. A malfunction that causes these features to become unavailable during operation may increase safety risks for drivers and other road users. I would appreciate your guidance regarding the most appropriate course of action to resolve this issue. Specifically, I would like to know whether my vehicle may qualify for repair under the referenced service action or whether BMW can provide additional diagnostic or corrective measures. Thank you for your time and assistance. I look forward to your response.