the extent to which there exists a serious risk to the safety or environmental performance of vehicles that are fitted with the parts or equipment in question;
a mhéid is ann do riosca tromchúiseach do shábháilteacht nó d'fheidhmíocht chomhshaoil na bhfeithiclí ar a bhfuil na páirteanna nó an trealamh i gceist feistithe;