2023 BMW M3 CS spy shots and video: Hardcore sedan coming soon

BMW’s current M3 sedan and related M4 coupe have only been with us for a bit over a year, but hotter versions of both cars are coming to showrooms soon. An M4 CSL was revealed in May but will have a production run of only 1,000 units. Don’t worry if you miss out as some of the car’s upgrades will transfer over to a slightly tamer M3 CS that’s been…