2020 BMW M550 Bulb Size

Decision: you need the correct bulb sizes for a 2020 BMW M550i xDrive, and this list is intended to make that choice efficient and reliable. Constraints include model-year variations and trim-dependent options that create modest uncertainty; those are noted where evidence suggests differences rather than assumed uniformity. Options are presented by lamp function—headlight, fog, turn, brake—so you can compare sizes side by side and form a working hypothesis about replacements. Interpretation of manufacturer specifications and aftermarket fitment data is provided to highlight where compatibility seems likely and where limitations warrant closer inspection. Recommendation: use the specific sizes listed as a starting point, cross-check with your vehicle’s manual, and verify fit before purchase. Risks include incorrect fit or reduced performance if trim-specific sensors are overlooked. Affiliate disclaimer: some product links earn a commission at no extra cost to you, which supports maintaining updated evidence and comparisons.