You can not say bracha in a Mazda as it is AZ. That is Avoda Zara. You also can’t say bracha over other AZ – Astra Zenica – as astra means “star” and Zenica means nothing, so you don’t want to say brocha over Avoda Zara or over nothing (as in “thanks you for nothing”). It also has questionable performance, so no bracha b’sofek. On a plus side, seems like Wallenbergs still have a share in the company.
other questionable places for bracha, ask your posek –
Subaru (stars, Pleiades), Yugo (sakana), Ford (anti-semite), VW (ditto) esp Rabbit and Beetle – not kosher. Tesla – drives by itself, no bracha required