2016 BMW 550 Gran Turismo Bulb Size

Misconception: people often think bulb sizes are interchangeable or obvious from the part number. Why it seems true: many bulbs look alike and car manuals can be dense, so it feels quicker to guess. Think of it as a visual shortcut that can lead to the wrong fit. What is true: the 2016 BMW 550i GT uses specific bulb sizes for headlights, fogs and interior lights, and fit, connector type, and beam pattern matter as much as physical diameter. A simple mental model is to match socket type and function, not just shape. Rule of thumb: check both the car model and the bulb location before ordering. Implications and quick recap: use the list on this page to confirm sizes, then test fit briefly. Note: some links on this page are affiliate links; I may earn a small commission at no extra cost to you.