Is it necessary to replace the spark plugs in an A4L at 20,000 kilometers?

[DiAngelina]

Audi A4L requires spark plug replacement at 20,000 kilometers. As a crucial component of gasoline engines, the primary function of spark plugs is ignition. They receive pulsed high-voltage electricity from the ignition coil and discharge at the tip to generate an electric spark. After gasoline is compressed, the spark plug emits an electric spark to ignite the gasoline, ensuring the normal operation of the engine. Effects of damaged spark plugs: Damaged spark plugs can directly lead to various issues such as leakage in the vehicle's ignition system, increased fuel consumption, and reduced power. The most significant problem is difficulty in ignition, which affects the normal use of the vehicle. Severe erosion of the spark plug, such as scarring at the top, damage, or melted electrodes, indicates that the spark plug is damaged and should be replaced. Steps for replacing spark plugs: Open the hood, lift the engine's plastic cover, and remove the high-voltage distributor wires. 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 external debris like leaves or dust 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 high-voltage distributor wires according to the firing order and secure the cover.