2020 Buick Regal TourX Bulb Size

I started this bulb size chart to make changing lights on a 2020 Buick Regal TourX straightforward. Think of it as a compact reference so you can identify headlight, fog, and interior bulb sizes quickly without hunting through manuals or forum threads. From my experience, that simple clarity reduces confusion and saves time. A small win is spotting the right bulb on the first try; that builds confidence. Expanding the scope, the list groups bulbs by location and includes common aftermarket equivalents as a practical mental model. As I refined the chart, I used a rule of thumb: match fitment and wattage before brand preference. I validated entries against OEM specs and workshop checks. Quick recap: use the chart to verify sizes for your Regal TourX, then pick a compatible bulb. I may earn a small commission if you buy through links on this page, at no extra cost to you.