The article says that they need approval to use Rust in safety critical components and you get approval by showing Rust is working in other places. They say in

The article says that they need approval to use Rust in safety critical components and you get approval by showing Rust is working in other places. They say in the article that one of the reasons they chose Rust was for it's safety-first approach which matches well with Volvo's ideology. > I thought this would be useful for Volvo Cars because it embodies the same type of Ideology that you want when you’re developing safety-critical software. So I think "Makes sense that one of the most safety focused manufacturers would go for it." is accurate.