BMW 3 Series 5 Series (E90/E60/E65) Headlight Adaptive Module Ballast 63127189312

Your BMW 3 Series (E90) or 5 Series (E60/E65) may have power delivery irregularities at night, such as malfunctioning adaptive headlights, abnormal left-right headlight leveling, or headlights unable to turn on or flickering frequently. This is typically a symptom of aging or damaged headlight adaptive module ballast. This part, with OEM number 63127189312, fits BMW E90 3 Series, E60 5 Series, and E65 7 Series. Installation notes: first disconnect the battery negative terminal to avoid short circuits; ensure module and headlight connector is clean, oxidation-free, and firmly mounted to prevent contact issues from vibration.