2017 BMW 740 Bulb Size

Misconception: people often think one bulb size list fits every model year and trim, so swapping bulbs seems simple. Why it seems true: many bulbs look alike and parts stores show similar fits, so it feels safe to pick by appearance. What is true: for a 2017 BMW 740i there are specific bulb types for headlights, fogs, indicators, and interior lamps. Think of it as a small parts map — the right size matters for fit, beam pattern, and electrical compatibility. The rule of thumb is to check this chart against your vehicle’s owner manual or the existing bulb before buying. Implications and quick recap: using the correct bulb avoids glare, poor lighting, and socket issues. Quick tests: compare part numbers, check fitment diagrams, and confirm voltage. Some links on this page are affiliate links; if you buy through them I may earn a small commission at no extra cost to you.