2012 Smart fortwo Bulb Size
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Bulbs Chart
2012 Smart fortwo Center High Mount Stop Light Bulb (921)
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Best Choice
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LED Lights
Smart fortwo Bulb Size By Years
tl;dr: This bulb size chart lists the correct replacement bulbs for a 2012 Smart fortwo by circuit and position, saving you time when you shop. My recommendation is to use the chart as a checklist before buying, confirm fit visually, and carry a spare for routine maintenance.
Using the right bulb affects visibility, compliance, and connector longevity. Replacing bulbs in sequence—inspection, removal, fit check, test—reduces mistakes and wasted purchases. Gotchas include similar-looking bulbs with different bases and unofficial equivalents that may reduce lifespan.
Next steps: consult the chart, match the socket, then order the part. Affiliate disclaimer: links on this page may earn a small commission at no extra cost to you; recommendations are based on hands-on experience and not paid endorsements.
2012 Smart fortwo specs
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Exterior
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