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What Maintenance Should Be Done at 40,000 Kilometers for a Car?

3 Answers
LaValerie
08/29/25 5:17am
Regular replacement of spark plugs (at 40,000 kilometers or based on driving conditions). Routine maintenance (engine oil and oil filter) etc. The following is an introduction to car maintenance: Introduction: Car maintenance refers to the preventive work of regularly inspecting, cleaning, supplying, lubricating, adjusting, or replacing certain parts of the car, also known as car servicing. Purpose of Maintenance: The purpose of car maintenance is to keep the car clean, maintain normal technical conditions, eliminate hidden dangers, prevent failures, slow down the deterioration process, and extend the service life. Scope of Maintenance: Modern car maintenance mainly includes the engine system (engine), transmission system, air conditioning system, cooling system, fuel system, power steering system, etc.
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DeRowan
09/11/25 3:02am
My car has just hit 40,000 kilometers, feeling like a middle-aged person needing a comprehensive check-up. I realized it's time to change the engine oil and oil filter – these are basics, as old oil can cause engine wear and noise. Checking the brake pads and discs is also crucial; excessive wear can increase braking distance, and safety comes first. Rotating the tires can extend their lifespan and prevent uneven wear and alignment issues, while checking tire pressure saves money and ensures safety. The air filter and cabin air filter should be replaced if clogged, as they affect engine intake and cabin air quality – weak AC cooling in summer is quite troublesome. If the spark plugs haven’t been replaced, they should be inspected too, as unstable ignition can lead to sluggish acceleration. A full inspection of the chassis bolts and suspension system is necessary; looseness can cause uncomfortable bumps while driving. Regular maintenance costs much less than repairs – I always follow these steps for a more worry-free drive.
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VanEsther
10/25/25 3:52am
As a long-time car enthusiast, I believe the 40,000-kilometer mark is a critical milestone. Beyond the routine oil change, the oil filter must be replaced simultaneously to ensure proper engine lubrication. Spark plugs should also be replaced at this point—failing to do so will reduce ignition efficiency and increase fuel consumption by an extra half-liter per 100 kilometers, which simply isn't cost-effective. Cleaning the air filter improves airflow efficiency, making the engine run smoother. Don’t forget to inspect the braking system and coolant to prevent overheating-related accidents. Rotate the tires to prevent uneven wear and extend their lifespan, and check the battery voltage to ensure reliable cold starts. Lastly, replace the cabin air filter to maintain fresh and healthy air inside the car. These small steps can significantly prolong your car’s life and save you from costly repairs down the road.
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