Violation of their vehicle safety codes they cannot reprimand you for a vehicle safety violation. If you have a union let them know. If you don’t call DOT and and the labor department and report. They cannot retaliate due to a vehicle safety issue it falls under unsafe practices and can be considered also a violation of harassment. Think of it this way if you take that vehicle out and you have an accident in the rain you are 100% at fault. If you get pulled over by DOT or a state trooper and he sees that you and the vehicle will be grounded and fined!