Is it necessary to replace the spark plugs of Q5L after 20,000 kilometers?

[Diane]

Whether the Q5L needs to replace the spark plugs after driving 20,000 kilometers depends on the vehicle's usage condition. If the spark plugs are functioning normally, replacement is not required. Below are the relevant details: 1. Function: The function and role of spark plugs are to introduce tens of thousands of volts of high voltage into the combustion chamber, generating sparks between the spark plug electrode gaps to ignite the air-fuel mixture. Working in conjunction with the ignition system and fuel supply system, they enable the engine to perform work, significantly influencing the engine's performance. 2. Spark plug classification: Spark plugs are categorized into resistor spark plugs, platinum spark plugs, and iridium spark plugs. Generally, resistor spark plugs have a lifespan of 20,000 kilometers, platinum spark plugs last up to 40,000 kilometers, and iridium spark plugs can endure between 60,000 to 80,000 kilometers.