How do I report a defect in a Bus rolling stock?

To enable the operator concerned to act as quickly as possible on the network it operates, it is advisable to report any anomaly directly to the operator by indicating: the day, time, line, bus registration number, carrier, etc.

Find the name of the operator of my line

You can send a copy of your message to Ile-de-France Mobilités so that it can ensure the response you receive.