| Inspection Results |  | | |
| Reading the tables The tables show the results from the annual roadworthiness inspection for each car model. You can see how cars of different ages did in the 2006 inspections. The tables reveal the proportion of cars that failed each tested component, and the proportion of cars that have failed in respect of one or more components under the headings of model-related faults, owner-related faults and environmental performance. We have collated the tested components into three groups as follows: Model-related faults Model-related faults are defects that may be difficult for the car owner to check, such as ball joints, brakes and spring seats. Faults in this group can often be related to the car’s design or the materials used in the construction of the part in question. Owner-related faults Owner-related faults are defects that are usually easy for the owner to check, such as tyres, bulbs, windscreen and wiper blades. Environmental performance This section shows the results of the exhaust gas measurements. In this test, emissions of carbon monoxide (CO) and hydrocarbons (HC) are checked at idling speed. Emissions of carbon monoxide are also checked at higher revs, and there is also a test to ensure that the lambda reading (the fuel/air mixture) is correct. Green and red symbols The inspection results for all the cars are then collated to obtain a value for the “average car”. For each car model, the failure frequency for each component is compared with the corresponding value for the average car. The result of this comparison is marked with green or red symbols as follows: A green symbol indicates that the value obtained is at least 25 percent lower (better) than that of the average car, but at least two percentage points lower than that of the average car. A red symbol indicates that the value obtained is at least 25 percent higher (poorer) than that of the average car, but at least two percentage points higher than that of the average car. Values not marked are within the range for the average car. The more green symbols a car model has, the better it has done in the inspection. The reverse too is true – the more red symbols a car model has, the worse it fared in the inspection. When studying the table, it is also worth bearing in mind the type of fault a car model has; some faults may be far more serious from the viewpoint of traffic safety and/or environmental compatibility, and may even be more expensive to repair. If one or more model years/ages are missing from the table, this is because the car model did not sell sufficiently to offer a statistically secure result or because it was not available for the relevant model year/age |   | | |