Is a particulate filter mandatory?

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Yes, since 2011, a particulate filter has been mandatory for all passenger cars. Since 2012, this also applies to all delivery vans. Before 2011, there were already cars on the market with a particulate filter, even though it was not yet mandatory. The chance that your car does not have a particulate filter is therefore not very large, but also not impossible. Proper maintenance of the particulate filter is important to extend its life.