ISO 3929:2003规定了在检查或维护期间直接测量道路车辆废气排放浓度的方法。本标准适用于最大授权总质量（ISO-M08，定义见ISO 1176）不超过3.5 t、配备受控点火发动机的车辆，但不包括配备燃油/机油混合物（带或不带自动混合器）的车辆。这些方法可全部或部分用于官方车库的定期检查、官方路边检查（如警察）以及维护和诊断操作。

ISO 3929:2003 specifies methods for the direct measurement of the concentration of exhaust gas emissions from road vehicles during inspection or maintenance. It is applicable to vehicles having a maximum authorized total mass (ISO-M08, as defined in ISO 1176) not exceeding 3,5 t, equipped with controlled ignition engines, but excluding those supplied with a fuel/oil mixture (with or without automatic mixer). The methods can be used, either totally or partially, for periodic inspections in official garages, official roadside checks (e.g. by police) and maintenance and diagnostic operations.