Home » News » Industry News » How often do spark plugs need to be replaced?

How often do spark plugs need to be replaced?

Many car enthusiasts may have questions: should the spark plugs be replaced during maintenance? How often do I change the spark plugs?
A car owner has reported a repair issue: insufficient power during driving, severe idle vibration, and high fuel consumption.

As shown in the picture: Volkswagen Sagitar uses a 60000 kilometer spark plug, which turns black and the contacts have already been burned out. Poor combustion leads to insufficient power, a lack of cylinder response, a series of jerks during driving, and high fuel consumption.
Like our car parts, most of them use lifelines, like spark plugs. Different materials and brands have different life cycles.
1. Nickel alloy spark plugs 20000 to 30000 kilometers
2. 40000 kilometers of single platinum spark plugs
3. Dual platinum spark plugs 60000 kilometers
4. Iridium spark plugs, 80000 kilometers, etc.
The service life of these spark plugs is only recommended by the parts manufacturer. In fact, the vehicle model and driving habits will have an impact on the service life of the spark plugs, so it is judged that if the spark plugs are not replaced.
Personally, it is recommended to disassemble and inspect the spark plugs every 3 years or 60000 kilometers to determine whether to replace them based on their color and contact spacing.
4S stores also have some repair garages that replace them according to the maintenance manual, which saves time, but it’s not easy to make money. It’s better to check and see the specific condition of the quality before making a decision.


There may be many car enthusiasts who see this, but what are the consequences of not replacing the spark plugs?

1. Insufficient power and idle shaking: A decrease in spark plug performance will cause a linear decrease in the engine’s ignition performance, resulting in weak acceleration, insufficient power, and shaking during acceleration.
2. Higher fuel consumption: Abnormal ignition can cause insufficient combustion of the mixture, reduce conversion efficiency, and require more gas for combustion, accelerating fuel consumption.
3. In severe cases, there is also a lack of cylinder work, resulting in a series of uncomfortable jerks.