How often should the A6L spark plugs be replaced?

[JudeRose]

The manufacturer recommends replacing them every 20,000 kilometers. Here is the relevant information: 1. The Audi A6L NGK spark plugs are part of the ignition system. Their main function is to introduce the high-voltage electricity generated by the ignition coil into the engine cylinder, creating a spark between the spark plug electrodes to ignite the air-fuel mixture, thereby enabling the engine to perform work. 2. The new Audi A6L also adopts an integrated chassis optimization solution and uses a 'partial modulation' manufacturing process in some structural components, integrating the characteristics of different materials into a single component.