Article 51 ... Evaluation regarding vehicles, systems, components and separate technical units suspected of presenting a serious risk or non-complianceF7

Where, based on their own market surveillance activities, or based on information provided by F1the approval authority or a manufacturer or based on complaints, the market surveillance F2authority has sufficient reasons to believe that a vehicle, system, component or separate technical unit presents a serious risk to the health or safety of persons or to other aspects of the protection of public interests covered by this Regulation or does not comply with the requirements laid down in this Regulation F3or, where Article 5A applies to the vehicle, system, component or separate technical unit, the EU Type Approval Regulation, they shall evaluate the vehicle, system, component or separate technical unit concerned with respect to the relevant requirements laid down in this Regulation F4or, where applicable, the EU Type Approval Regulation. The relevant economic operators F5... shall cooperate fully with the market F6surveillance authority, which shall include forwarding the results of all relevant checks or tests performed in accordance with Article 31.

Article 20 of Regulation (EC) No 765/2008 shall apply to the risk assessment of the vehicle, system, component or separate technical unit concerned.