Is it necessary to replace Audi spark plugs at a 4S shop?

[SanJune]

Audi spark plugs can be replaced either at a 4S shop or at a repair shop. Spark plugs are crucial components of a gasoline engine's ignition system. They introduce high-voltage electricity into the combustion chamber, causing it to jump the electrode gap and generate a spark, thereby igniting the combustible air-fuel mixture in the cylinder. Steps for replacing spark plugs: Open the hood, lift the engine's plastic cover, remove the high-voltage ignition wires, and mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for any leaves, dust, or debris on the exterior and ensure they are thoroughly cleaned. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to tighten it further. Reinstall the removed high-voltage ignition wires in the correct firing order, then reattach the cover.