Maybe/app/views/accounts/accountables/_vehicle.html.erb

<%# locals: (f:) %>

<div>
  <hr class="my-4">

  <div class="space-y-2">
    <%= f.fields_for :accountable do |vehicle_form| %>

      <div class="flex items-center gap-2">
        <%= vehicle_form.text_field :make, label: t(".make"), placeholder: t(".make_placeholder") %>
        <%= vehicle_form.text_field :model, label: t(".model"), placeholder: t(".model_placeholder") %>
      </div>

      <div class="flex items-center gap-2">
        <%= vehicle_form.text_field :year, label: t(".year"), placeholder: t(".year_placeholder") %>
        <%= vehicle_form.text_field :mileage_value, label: t(".mileage"), placeholder: t(".mileage_placeholder") %>
        <%= vehicle_form.select :mileage_unit,
                  [["Miles", "mi"], ["Kilometers", "km"]],
                  { label: t(".mileage_unit") } %>
      </div>
    <% end %>
  </div>
</div>