2018 BMW X3 Bulb Size

Goal: You need the correct bulb sizes for a 2018 BMW X3 but aftermarket catalogs are confusing. This chart gives a single, recommended reference so you can match headlight, fog, turn and interior bulbs quickly and avoid wrong purchases. The list assumes factory trim and notes common trade-offs like LED retrofit compatibility. Prerequisites and step by step: check your vehicle VIN and compare the chart entries to the lamp housing before ordering. Validate fitment by testing bulbs on a bench or swapping one side first. If a fit or connector mismatch occurs, verify OEM part numbers and consider adapter harnesses as a troubleshooting option. Validation and wrap up: use the chart as a practical guide and confirm physical fitment before installation. Affiliate disclaimer: some links provide a commission at no extra cost to you; recommendations are based on experience and intended to help you find compatible bulbs.