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I think the strictest laws in the US require a total of two rear-facing mirrors. (Some states allow vehicles with only one mirror) So, two side mirrors count.

I think the strictest laws in the US require a total of two rear-facing mirrors. (Some states allow vehicles with only one mirror) So, two side mirrors count. Back in the early 90s you could buy new cars that came with only a driver side mirror and an interior rear-view mirror -- the passenger side mirror was an option!

buildsjets 3y ago
Yes. I had to install one on a Volvo 760 wagon that came without. Also installed a center-mounted stop light for it as those were still optional/just being introduced.