2020 Buick Regal Sportback Bulb Size

Goal: This bulb size chart helps you quickly match the right replacement bulbs for a 2020 Buick Regal Sportback, removing guesswork and avoiding fitment mistakes. Start here when a headlight, fog light, brake, or interior lamp fails so you can compare socket type, wattage, and color temperature against manufacturer recommendations. Prerequisites: assume you have the vehicle manual and basic tools for access. The chart shows recommended sizes and notes trade-offs like brightness versus heat and legal constraints for road use. Use the chart as a starting point and validate by checking the physical socket and owner manual before ordering. Affiliate disclaimer: some links go to retailers and I may earn a small commission at no extra cost to you. This helps maintain the guide; recommendations are based on practical experience and validation steps.