2021 BMW 740 Bulb Size

tl;dr: This bulb size chart lists recommended lamp types and sizes for a 2021 BMW 740i, so you choose the right replacement quickly. I recommend confirming the socket type before buying. Recommendation: Start with the chart entry for each lamp—head, fog, turn, brake—and match OEM specs or trusted LED equivalents. I draw on hands-on experience replacing bulbs and testing fit and beam. Impact and Risks: Using the correct bulb preserves safety, beam pattern, and CAN-bus compatibility. The wrong bulb can trigger errors or glare, and may reduce lifespan. Next steps: Use the checklist on the page, verify part numbers, then purchase from a reputable seller. Affiliate disclaimer: I may earn a small commission if you buy through links, at no extra cost to you.