Which European countries banned smoking in cars?
Austria: partial ban

Austria prohibits smoking in cars when minors are present. The law came into effect in May 2018 to protect children from secondhand smoke.
Bosnia and Herzegovina: no ban

Smoking in cars isn’t restricted in Bosnia and Herzegovina. Despite broader anti-smoking campaigns, no laws prohibit smoking in private vehicles.
Czechia: no ban

In Czechia, smoking in cars remains legal. No regulations apply to smoking around children or vulnerable passengers in vehicles.
Estonia: no ban

Estonia has no legal ban on smoking in private vehicles, regardless of passenger age or condition.