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 it by indicating: the day, the time, the line, the bus registration number, the 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 that will be given to you.