# Commission Regulation (EU) 2017/1151 of 1 June 2017 supplementing Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information, amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) No 1230/2012 and repealing Commission Regulation (EC) No 692/2008 (Text with EEA relevance), Division 4.7.1: If a verification of the performance of the OBD system is to be carried out, it shall be conducted in accordance with the following requirements:

Extent: E+W+S+N.I.

4.7.1.1.When the approval authority determines that the quality of production seems unsatisfactory, a vehicle shall be randomly taken from the family and subjected to the tests described in Appendix 1 to Annex XI.
4.7.1.2.The production shall be deemed to conform if this vehicle meets the requirements of the tests described in Appendix 1 to Annex XI.
4.7.1.3.If the vehicle tested does not satisfy the requirements of section 4.7.1.1, a further random sample of four vehicles shall be taken from the same family and subjected to the tests described in Appendix 1 to Annex XI. The tests may be carried out on vehicles which have completed a maximum of 15 000 km with no modifications.
4.7.1.4.The production shall be deemed to conform if at least three vehicles meet the requirements of the tests described in Appendix 1 to Annex XI.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/I/division/4/division/4.7/division/4.7.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-I/division-4/division-4.7/division-4.7.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.