Relays are used to supply electrical current to components of some of the vehicle's electrical accessories. A malfunction of the relay will result in the failure of the component it serves.
If there is a suspicion of a faulty relay, it should be removed and subjected to diagnostic testing at a representative office of the company or a specialized auto repair shop. The replacement of the failed relay is carried out as an assembly.
[Content source: the specified website AudiManual.ru]
Relay — general information (Audi A3 8L)
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